Telling Male And Female Guinea-Pigs Apart
How can I tell the difference between male and female cavies, and also what age do they have to be separated so they don't mate?
When they are about a week old, turn the babies over and examine their genital area. You will see that both males and females have a ‘Y configuration’.
At this early age, males (boars) can be distinguished from the females (sows) by a very slight raised circular formation which is evident between the two arms of the ‘Y’.
You should remove all the boars when they are about 4 weeks old to safeguard against unwanted pregnancy.