Planning ahead is easier when you know when your dog’s next heat is due. This free dog heat cycle calculator predicts the next three heats from the date her last one started. It shows the likely fertile days and a day-by-day timeline of what happens in each stage. Use it to protect her from unplanned litters or to prepare for a planned one.
How to use:
- Enter the first day of her last heat.
- Choose how often she usually comes into heat.
- Enter how many days her last heat lasted.
- Click Predict next heat to see dates and the timeline.
FAQs:
Q: How often do dogs go into heat?
A: Most dogs every 6 to 7 months. Some large breeds only once a year.
Q: How long does a dog’s heat last?
A: Usually about 2 to 4 weeks. The most fertile days are often around days 10 to 14.
Q: When is a dog’s first heat?
A: Usually between 6 and 24 months of age. Smaller breeds tend to start earlier.
Q: When should I see a vet?
A: If bleeding lasts over 3 weeks, if she seems unwell, or if you plan to breed her. A vet progesterone test is the most accurate way to time breeding.
