Free Tools for Breeders
Free, anonymous, no-signup utilities that run in your browser. Use them for planning. Use BreederHQ for the actual records.
Heat Cycle Calculator
- dogs
Enter the first day of heat to estimate proestrus, estrus, the rough breeding window, the estimated whelping window, and the approximate next-heat date.
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Progesterone Timing Tracker
- dogs
Log P4 test results in cycle order, see the trend across readings, and bring organized data to your reproductive vet. Educational planning tool. Not veterinary advice.
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Whelping Date Calculator
- dogs
- horses
- goats
- sheep
- cattle
Enter a breeding date (or progesterone-confirmed ovulation date for dogs) to estimate the due date, the normal due window, and species-specific prep and monitoring dates.
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Breeding Planner
- dogs
- horses
- goats
- sheep
- cattle
Project upcoming heat cycles, breeding windows, and the open time between them for up to three females across multiple species.
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Puppy Vaccination Schedule Generator
- dogs
Enter a litter’s birth date to generate a general puppy vaccination planning schedule from 6 to 16 weeks, with optional go-home handoff dates. Planning tool only. Confirm specific vaccines and protocol with your veterinarian.
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Puppy Deworming Schedule Generator
- dogs
Enter a litter’s birth date to generate a general puppy deworming planning schedule from 2 to 12 weeks, with optional go-home handoff dates. Planning tool only. Discuss products, doses, and protocol with your veterinarian.
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Puppy Weight Tracker
- dogs
Log a litter’s birth date and each weight reading in ounces, grams, or pounds. See daily gain, total gain, and a trend summary that flags flat or declining patterns. Visualization tool only. Not veterinary advice.
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Coefficient of Inbreeding (COI) Calculator
- dogs
- cats
- horses
- goats
- sheep
- cattle
- rabbits
- alpacas
- llamas
Enter sire, dam, and up to five generations of ancestors. The calculator finds common ancestors automatically and returns Wright’s coefficient of inbreeding as a percentage with per-ancestor contribution. Planning tool only. For live COI on every planned breeding, use BreederHQ.
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Puppy Application Builder
- dogs
Toggle the screening sections you want (household, experience, breed fit, lifestyle, housing, training, vet reference, placement, contract acknowledgement) and generate a ready-to-send puppy application template. Template builder only. No data collected.
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No tools yet for that species. .