Healthy Females, Healthy Litters
The 10 Ps of Improved Canine Fertility
A Practical Breeder-Focused Guide to Improving Reproductive Outcomes in Dogs
Successful canine reproduction depends on more than simply pairing a sire and dam. Fertility and successful puppy outcomes improve when breeders combine accurate timing, excellent health and nutrition, quality semen, careful preparation, appropriate neonatal care, and a low-stress environment.
The 10 Ps of Improved Canine Fertility provide a practical framework for organizing these priorities—from planning the breeding and timing ovulation to preparing for whelping and caring for newborn puppies.
1. Planning
Begin every breeding with a written plan. Include the female's cycle history, target stud dog, semen type, travel or shipment coordination, veterinary contacts, anticipated whelping date, and contingency options.
Planning helps prevent missed fertile windows and reduces last-minute decisions that can compromise reproductive outcomes.
If you are new to breeding or want to strengthen your breeding program, Canine Reproduction and Neonatology is a valuable reference. This comprehensive resource covers breeding stock selection, breeding, pregnancy, whelping, puppy care, and stud dog management.
Your whelping plan should also include the supplies you will need before labor begins. You do not want to be searching for essential equipment after the first puppy arrives.
A MagnaBox Whelping Box is a good option for creating a secure, sturdy space for the dam and her puppies. A whelping box should be easy to clean and disinfect, and sturdy enough to keep puppies safely contained as they become more mobile. The MagnaBox can also be taken apart and stored flat between litters.
You will also want clean, washable bedding. Breeder's Edge® Repeat Washable Whelping Pads provide a comfortable, grippy surface for puppies while making it easier to monitor urine, the dam's discharge, and overall cleanliness. Layering pads in the whelping box allows you to remove a soiled layer with minimal disruption to mom and puppies.
Think through your entire whelping setup ahead of time, including heat, temperature monitoring, cleaning supplies, identification supplies, feeding supplies, and emergency equipment.
2. Physical Health
Optimize the health of both the bitch and stud dog before breeding.
This includes maintaining an appropriate body condition, keeping preventive care current, controlling parasites, screening for breed-related health concerns, and evaluating for reproductive tract disease when indicated.
Overweight, underweight, chronically ill, or poorly conditioned dogs may have reduced reproductive success.
Before breeding, discuss your dog's health history and reproductive goals with your veterinarian or a veterinary theriogenologist. A pre-breeding examination can help identify problems before they interfere with conception or pregnancy.
Good hygiene is also important throughout the reproductive process. Keep the breeding and whelping environment clean and use products appropriate for animals and newborns.
For cleaning the whelping area and supplies, Chlorhexidine can be used according to label directions. Keeping cleaning supplies, paper towels, and a trash receptacle close to the whelping area makes it easier to maintain a clean environment.
After whelping, Animal Facility Disinfectant by Pro Vet Logic can help clean and disinfect appropriate surfaces between litters. Always follow the product label for dilution, contact time, ventilation, and safe use around animals.
3. Prenatal Care
Prenatal care is just as important for dogs as it is for people.
This includes maintaining ideal body condition, providing appropriate nutrition, following a preventive-care program recommended by your veterinarian, and addressing parasite prevention, heartworm prevention, flea and tick control, hygiene, and Brucella testing as appropriate.
Nutrition Matters
The importance of appropriate nutrition cannot be overstated.
You cannot expect excellent fertility if you are not providing the nutrients necessary to support the reproductive system. Nutrition is not an area where breeders should cut corners.
Macronutrients include fats, carbohydrates, proteins, and fiber. Micronutrients include vitamins and minerals. Micronutrients can be much more difficult to evaluate simply by looking at the outside of a dog-food package.
If a client is struggling with fertility, some of the first questions to ask are:
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What are you feeding?
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What else are you feeding?
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What supplements are you giving?
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How long has the dog been eating this diet?
Work with your veterinarian or a veterinary nutrition professional to select an appropriate, complete and balanced diet for the life stage and reproductive status of your dog.
Raw meat and homemade diets should not be used without careful formulation and veterinary nutritional guidance. Improperly balanced diets can provide too much or too little of important nutrients, and raw animal products can expose dogs and people to bacteria and parasites.
Food should also be stored properly. Keep it in the original manufacturer packaging and store it in a clean, dry location rather than transferring it to another container.
As pregnancy progresses, nutritional needs change. Your veterinarian can help determine when a dietary transition is appropriate and how much food your pregnant or lactating bitch should receive.
4. Progesterone Timing
Accurate ovulation timing is one of the most important tools for improving fertility.
Progesterone testing can help identify ovulation, determine the fertile window, estimate the expected whelping date, and plan breedings or a cesarean section when indicated.
Timing becomes especially important when using chilled or frozen semen because sperm longevity differs depending on semen type and preparation.
Test Early and Continue Testing
Progesterone testing should begin early enough in the heat cycle and be repeated as recommended by your veterinary team. Continue testing long enough to establish that ovulation has occurred and to provide useful information for breeding and whelping decisions. Target Canine Ovulation Test Kits come in two convenient sizes, 6 count or 12 count, which allow you to perform mulitple tests.
Progesterone testing serves several important purposes:
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Confirming that ovulation occurred.
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Determining the appropriate time to breed, particularly when semen quality or longevity is a concern.
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Establishing a reliable reference point for predicting whelping and planning a cesarean section when necessary.
Progesterone typically begins at a low level when a bitch enters heat and rises as the cycle progresses. Ovulation is generally associated with progesterone reaching approximately 4–8 ng/mL, followed by a continued rise. Exact values and interpretation can vary depending on the laboratory, analyzer, and individual dog.
Your veterinarian should interpret progesterone results in combination with the dog's clinical signs and other reproductive information.
Vaginal Cytology
Vaginal cytology is an older but still useful reproductive tool.
It can help breeders better understand the stage of a heat cycle, particularly when there is uncertainty about where the bitch is in her cycle. However, vaginal cytology should not be considered a replacement for quantitative progesterone testing when highly precise timing is required, such as with frozen semen breedings or a scheduled cesarean section.
Quantitative vs. Semi-Quantitative Testing
Quantitative progesterone testing provides a specific numerical result. Semi-quantitative tests use visual color changes to estimate progesterone levels.
For precise breeding or cesarean timing, quantitative testing is generally preferred. If you perform progesterone testing in-house, periodically compare your results with your veterinarian's in-house analyzer or a reference laboratory to make sure your equipment is producing reliable results.
This is especially important when timing frozen semen breedings or planning a cesarean section before labor begins.
Timing the Breeding
In general, fresh or fresh-chilled semen breedings are often performed approximately 48 hours after ovulation, while frozen semen breedings are often performed approximately 72 hours after ovulation.
However, breeding timing can vary depending on the semen type, breeding method, progesterone analyzer, reproductive history, and experience of the veterinary team.
Do not rely on a single progesterone number without considering the complete testing pattern. Work with a veterinary professional experienced in canine reproduction to determine the best timing for your individual bitch.
Accurate ovulation timing can also help establish a more reliable expected whelping date. A bitch generally whelps approximately 63 days after ovulation, although individual variation occurs.
When a planned cesarean section is indicated, your veterinarian can use ovulation timing along with the dog's breed, litter size, fetal development, and clinical status to determine an appropriate delivery date.
For more detailed information on canine reproduction, the book Canine Reproduction and Neonatology provides a comprehensive reference for breeders and veterinary professionals.
5. Potency of Semen
Evaluate semen quality before relying on the breeding.
Important factors include:
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Sperm count
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Motility
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Morphology
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Collection quality
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Storage conditions
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Shipping and handling time
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Type of semen being used
Fresh, chilled, and frozen semen have different characteristics and expected longevity. Breeding timing should therefore be matched to the semen source and the insemination method.
If fertility has been unsuccessful despite appropriate timing, semen evaluation should be part of the investigation. The iSperm Semen Analyzer is a smart investment for breeders needing flexible and readily available semen testing.
A reproductive veterinarian or veterinary theriogenologist can help determine whether semen quality, timing, the female reproductive tract, or another factor may be contributing to missed pregnancies.
6. Puppy Count
If you are not planning a timed cesarean section, a puppy-count radiograph should generally be scheduled late in pregnancy.
A properly timed and positioned radiograph can help your veterinary team estimate litter size and determine whether all puppies have been delivered during whelping.
When to Schedule the X-Ray
Puppy-count radiographs are commonly performed approximately 55–59 days after ovulation, depending on the veterinarian's recommendation and the individual pregnancy.
The timing should be based on ovulation whenever possible rather than simply counting from the date of breeding.
For the most accurate count:
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Work with a veterinary clinic that has digital radiography.
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Follow your veterinary team's fasting instructions before the appointment.
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Allow the bitch to urinate and defecate before the radiographs when possible.
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Ask your veterinary team about positioning and exposure if the first images are not sufficiently diagnostic.
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Two lateral views—one with each side down—can help reduce superimposition of puppy skeletons.
Radiographs taken with the bitch on her back are generally less useful for counting because puppy skeletons can overlap the dam's spine.
Your veterinarian should interpret the radiographs rather than relying on photographs posted to social media for opinions. Digital diagnostic images contain significantly more information than a compressed social-media image.
When litter size is very large, accurate counting can become more difficult. Your veterinarian can help determine whether the litter size or breed warrants a planned cesarean section.
7. Preparation
Preparation is one of the best ways to improve your chances of a smooth whelping.
Have your whelping area established well before the expected delivery date. You should have your supplies organized, your veterinary contact information readily available, transportation arranged, and a plan for both routine and emergency situations.
Create a Safe Whelping Area
A MagnaBox Whelping Box provides a sturdy, secure space for the dam and puppies. Select the appropriate size for your dog and make sure the box is positioned in a quiet area away from drafts and excessive traffic.
Puppies need a clean surface that allows them to grip and move toward the dam. Breeder's Edge® Repeat Washable Whelping Pads can be layered in the box so a soiled pad can be removed and replaced without completely disrupting the family.
Temperature and humidity also matter. A Hygro-Thermometer can help you monitor the room and whelping environment so you can make adjustments as needed.
If supplemental heat is needed, a Deluxe Lectro-Kennel Heat Pad provides a heated surface for the whelping area. Always make sure puppies have enough room to move away from the heat source if they become too warm, and follow the manufacturer's safety instructions.
Another option for providing controlled warmth is the Whelping Nest, which features an adjustable thermostat and a surface designed for newborn puppies.
Keep Mom Clean
Bathing the dam several days before her expected whelping date can give her time to become completely dry before labor begins while helping you start with a clean mother.
Maximum Chlorhexidine Shampoo can be used as part of a veterinarian-approved hygiene routine before whelping. Follow the product label and veterinary recommendations for appropriate use.
Prepare for Labor
A Digital Thermometer can be useful for monitoring the dam's temperature during the days leading up to delivery. Your veterinarian can help you establish when to begin monitoring and how to interpret changes in temperature.
Keep Lube Jelly available for situations where lubrication is appropriate during temperature checks or veterinary-directed procedures. It is a non-spermicidal lubricant.
A Snapy Fit Water/Feed Bowl can help keep fresh water readily available to the dam during and after whelping.
If the dam needs to go outside during labor, use a secure leash. Poly Braided Leads are useful for safely taking her outside for a bathroom break or a short walk. Never assume a laboring bitch will stay close to you—especially when she is uncomfortable or preparing to deliver another puppy.
Prepare Your Emergency Kit
Your emergency supplies should be assembled before labor begins and reviewed with your veterinary team.
Depending on your veterinarian's recommendations, supplies may include:
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Breeder's Edge® Clean Cut™ Umbilical Scissors
These supplies should not replace veterinary care. Make sure you understand how and when each item should be used before labor begins.
8. Planned C-Section
Planning a cesarean section in advance, when medically indicated, can help avoid an emergency situation.
A planned C-section may be considered for certain high-risk breeds, very small or very large litters, previous dystocia, or other medical circumstances. Your veterinarian should determine whether a planned C-section is appropriate for your bitch.
Accurate ovulation timing is particularly valuable when planning a scheduled cesarean because it provides a more reliable reference point for fetal maturity.
For brachycephalic breeds and other dogs at increased risk for dystocia, early planning is especially important. Discuss timing with your reproductive veterinarian well before the expected delivery date.
Certain medications may be used by veterinarians around a planned C-section to support fetal readiness or maternal care. These decisions should always be made and administered by the veterinary team.
Prepare for the Unexpected
Even when you plan carefully, emergencies can happen.
Know where your regular veterinary hospital and emergency veterinary hospital are located. Keep the car fueled, your phone charged, and your veterinary contact information accessible.
Have your emergency supplies packed and ready to go.
Breeder's Edge® Oral Cal Plus™ Gel & Powder may be included in a breeder's whelping supplies when recommended by the veterinary team. Calcium products should be used according to veterinary guidance, particularly during active labor.
Other prescription products listed in a breeder's emergency plan—such as oxytocin, injectable calcium, metoclopramide, or other medications—should only be obtained and used under the direction of your veterinarian.
Keep Mom Calm
A calm environment can be especially important around whelping and nursing.
Thunderease Calming Diffuser uses dog appeasing pheromones and can be incorporated into the whelping environment to help promote a calmer atmosphere. Introduce it according to the product directions and well before the expected whelping date when possible.
9. Peaceful Environment
Stress can interfere with breeding behavior, semen collection, travel tolerance, appetite, and overall reproductive management.
Keep the bitch and stud dog in a calm, familiar, clean environment whenever possible.
Minimize:
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Unnecessary transportation
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Excessive handling
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Heat stress
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Crowding
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Loud or unfamiliar activity
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Conflict with other dogs
A peaceful environment becomes even more important after delivery.
Give the dam a quiet place to bond with her puppies without unnecessary visitors or interruptions. Keep the whelping area clean, warm, and appropriately monitored.
During the first several days, close observation is important, but constant disturbance can make it more difficult for the dam to settle and nurse.
10. Veterinary Partnership
The final—and perhaps most important—P is partnership.
For the best reproductive outcomes, breeders should develop a relationship with a veterinarian or veterinary theriogenologist who understands canine reproduction.
Veterinary guidance is especially valuable for:
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First-time breeders
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Repeat missed pregnancies
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Frozen semen breedings
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Poor semen quality
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Small or unusually large litters
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Reproductive abnormalities
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High-risk breeds
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Planned cesarean sections
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Neonatal emergencies
Whenever possible, maintain consistent veterinary care throughout the breeding, pregnancy, whelping, and neonatal periods. Working with the same veterinary team makes it easier to follow testing trends, establish timelines, and understand your dog's reproductive history.
Be willing to communicate, ask questions, and share your breeding records. And remember that veterinary teams are partners in your breeding program. Building that relationship before an emergency occurs can make a significant difference when you need help quickly.
Preparing for Newborn Puppies
Your veterinary partnership should extend beyond the birth itself.
Have supplies ready to support puppies who need additional attention.
Breeder's Edge® ID Me™ Collars can help you identify and track individual puppies, particularly in larger litters.
If a puppy needs supplemental feeding, Nursing Nipple w/Syringe or Sterile Feeding Tubes can provide options under appropriate veterinary guidance. Tube feeding should only be performed by someone who has been properly trained because improper technique can result in aspiration.
Breeder's Edge® Nurture Mate™ can provide colostrum supplementation when recommended, particularly when large litters or prolonged labor create additional nutritional challenges.
For puppies requiring additional warmth, a properly monitored incubator can be extremely useful. Puppywarmer Incubator provides a controlled environment for newborn puppies, while the Puppywarmer Oxygen Concentrator can provide supplemental oxygen when directed by a veterinary professional.
The RCOM Incubators and RCOM Oxygen Concentrator are additional options for breeders who need professional-grade neonatal support equipment.
For newborn puppies requiring resuscitation or respiratory support, your veterinarian should provide specific training and direction before you attempt emergency procedures.
Caring for the Dam After Whelping
The dam's nutritional and hydration needs remain high after delivery, particularly when she is nursing a large litter.
Doc Roy's® Forti Cal can provide additional calories when appropriate for the dam, particularly during periods of high energy demand. Discuss supplementation with your veterinarian rather than automatically adding multiple supplements to a complete diet.
Breeder's Edge® Oxy Momma™ is formulated to support maternal recovery and lactation and may be included in a post-whelping nutrition plan when appropriate.
For digestive support, Doc Roy's® GI Synbiotics provides prebiotic and probiotic support and may be useful when digestive upset occurs. Persistent vomiting or diarrhea should always be evaluated by a veterinarian.
Royal Canin Starter Mousse can be used as directed to help encourage food or water intake in dogs that need additional encouragement to eat or drink.
For puppies or adult dogs experiencing diarrhea, The Pink Stuff or Kaolin Pectin Liquid may be used as directed for supportive care. Diarrhea in newborn puppies can become serious quickly, so veterinary evaluation is important when symptoms are significant or persistent.
Breeder's Edge® Puppy Lyte provides electrolyte support that may be useful during periods of dehydration or illness when recommended by a veterinary professional.
Keeping Puppies Clean and Identified
After whelping, Rescue Wipes can help clean the dam and remove discharge or blood. Do not use wipes or other cleaners directly on newborn puppies unless specifically directed by your veterinarian. The dam should be allowed to lick and clean her puppies naturally.
For umbilical care, Breeder's Edge® Clean Cut™ Umbilical Scissors, Breeder's Edge® Clean Cut™ Umbilical Forceps, Breeder's Edge® Clean Cut™ Umbilical Cord Clamps, and Breeder's Edge® Clean Cut™ Povidone-Iodine Solution can be part of a prepared neonatal kit. Follow your veterinarian's instructions for proper cord care and management of any persistent bleeding.
Breeder's Edge® Nurture Flora™ is a probiotic supplement formulated for newborn puppies and kittens and can be incorporated into a neonatal care plan when appropriate.
The Bottom Line: Planners Improve Outcomes
Successful canine reproduction is a process, not a single breeding event.
The best outcomes come from combining:
Planning
Physical Health
Prenatal Care
Progesterone Timing
Potency of Semen
Puppy Count
Preparation
Planned C-Section
Peaceful Environment
Veterinary Partnership
When breeders plan ahead, monitor carefully, maintain excellent nutrition and hygiene, understand reproductive timing, and build a strong relationship with their veterinary team, they are better prepared to recognize problems early and respond when something does not go according to plan.
Have your supplies ready before you need them. Know your veterinary team's recommendations before labor begins. Keep your whelping area clean, calm, and organized. And make sure everyone involved knows what to do if the delivery becomes an emergency.
