How it works
With more than a few bred animals, due dates get hard to track. This calendar takes each animal's breeding date, applies the average gestation for its species, and sorts everything by due date. You can see at a glance who is next.
How to use it
Replace the examples with your own animals. Your list is saved in this browser on this device only; it is never uploaded. Print it for the barn wall, or download the dates into your phone's calendar.
Reference chart
| Species | Average gestation |
|---|---|
| Rabbit | 31 days |
| Pig | 114 days |
| Sheep | 147 days |
| Goat | 150 days |
| Cow | 283 days |
| Horse | 340 days |
| Alpaca | about 342 days |
| Donkey | about 365 days |
Frequently asked questions
Is my herd list saved?
Yes, in your browser on this device. It isn't sent to us. If you clear your browser data, or use another device, the list will be empty.
Why is the due date different from the species calculator?
The calendar uses the average for each species. The single-species calculators adjust for breed, for example Nigerian Dwarf goats or Brahman cattle.
Can I print it?
Yes. Use Print calendar for a clean page with just the due-date table.
Can I add the dates to my phone?
Download the .ics file and open it. Google Calendar, Apple Calendar and Outlook will import every due date.
Figures are typical values from university extension and breed-association guidance. Estimates only. Individual animals vary — confirm pregnancy and health questions with your veterinarian. Last reviewed 2026-09-18.