Keeping a lot of pigs, or caring for a surprise litter? Log each expecting sow or new litter and this tracker works out the due date and, most importantly, the day the pups must be sexed and separated so the herd stops growing. Everything stays private in your browser.
No litters logged yet. Add an expecting sow or a new litter above.
Guinea pig pregnancy lasts about 59 to 72 days (we estimate the due date at 66). Pups are born ready to go and can breed alarmingly young, so the date that really matters is 21 days after birth, when the litter must be sexed and split into a boy group and a girl group. The tracker counts down to that day and turns it red as it arrives. Tap Pups arrived on an expecting sow to switch her to the separate-by countdown.
A gentle reminder: please do not breed on purpose, birth is risky for sows and rescues are already full. The kindest way to run a big group is to keep the sexes apart from the start. See baby guinea pigs & pregnancy and plan sow and boar groups with the cage calculator.
Last updated August 2026 · Written from years of keeping long-haired guinea pigs in the Houston area. This is general care information, not veterinary advice. For anything medical, please see an exotic vet.
