What Heat Cycle Tracking Does for Your Program
Write down the first day of each heat, and Whelpify figures out when the next one is coming — then reminds you before it starts, so you're never caught off guard.
Learns Her Rhythm, Not a Breed Average
Every dog cycles differently. Predictions are built from her own recorded history — the more heats you log, the sharper they get.
Grounded in the Real Science
Phases follow the veterinary consensus: early heat, the receptive phase with the typical day 10–14 fertile window, then two months of after-heat and rest.
Enter the first day you noticed bleeding — one date is enough to start tracking.
Her card shows the current phase, the next expected heat, and the likely fertile window.
About two weeks before her predicted heat, you get an email and a dashboard alert.
Honest About Its Limits
Calendar estimates are for planning, not breeding decisions — the app reminds you that serial progesterone testing with your vet is how you time a breeding.
What You Can Do With Heat Cycle Tracking
Built From Published Veterinary Guidance
The phases, timing, and fertile-window estimates in this tool follow the published veterinary consensus — here's exactly what it was built from, so you can read the science yourself.
Estimates are for planning, not veterinary advice — for breeding decisions, work with your vet on serial progesterone testing.
Our Friends at Sirius Canine Fertility
Tracking tells you when — our friends at Sirius Canine Fertility help with the how. Canine reproduction specialists since 2000, they answer breeding and fertility questions and handle the hands-on work your cycle calendar can only point you toward.
Common Questions
How Accurate Are the Predictions?
They're estimates that improve with every heat you record — most dogs are fairly consistent with themselves. For breeding decisions, the app always points you to progesterone testing with your vet, which is the reliable way to time ovulation.
What If Her Cycle Is Unusual?
You can set her typical cycle length manually — anywhere from about 4 months to 14 months, which covers fast-cycling small breeds through once-a-year breeds like Basenjis.
Get Started With the Setup Guide
Follow the Heat Cycle Tracking guide for setup, everyday use, and the details to check along the way.
Your Website, Your Dogs, Your Own Domain
Bring your program together with a website, puppy listings, applications, and payments. Go annual and claim your free custom domain after your first successful payment.
Free custom .com for one yearAnnual: after your first successful payment. Monthly: after two successful payments.Go Annual and Get It Sooner
Annual plans charge when you activate your website, with no trial. Monthly plans include a 30-day trial for new customers. Standard .com only. Paid renewal after year one.