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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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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