Every dog is different. This tool estimates timing; breeding decisions should follow your vet’s guidance and testing.
Use the same rule each time—for example first day you saw bleeding—so your records stay consistent.
Six months is a common default, but many females run closer to seven or eight.
Enter your last heat date to see an estimated window.
Using this with real dogs
- Watch for proestrus signs (swelling, discharge) a week or two before standing heat.
- Coordinate timing with your reproductive veterinarian—especially for first-time or older dams.
- Pair estimates with the heat history you keep per dog so outliers are obvious year to year.
More on organization: managing your puppy waitlist with tagging and when to breed a dog.
Run your kennel with less chaos
Breeders Companion brings litters, puppies, buyers, and paperwork into one place.
Log heats and litters in Breeders Companion so your records stay with you, not on sticky notesFrequently asked questions
- How accurate is this estimate?
- It is a calendar estimate based on the last heat start date and an average cycle length you provide. Real cycles vary with health, season, stress, and age—use progesterone testing and your veterinarian’s advice for breeding timing.
- What date should I enter as “last heat”?
- Use the day you first saw proestrus or bleeding, or the convention your reproductive vet prefers. Being consistent matters more than which exact day you pick, as long as it matches how you track heats over time.
- Where can I log heats in the app?
- Breeders Companion includes heat tracking alongside dogs and litters so you can keep reproductive history with the rest of your kennel records.