gender companions

Hi, last week i got a baby guinea pig from the pets store and they said it's a girl, but when I arrived home, it started to bumble to her cage mate, which is 1 year older. The genitalia seems to be an Y, but has a lump above that Y and I'm not sure what gender my piggie is.

Hi, I am a wannabe guinea pig owner, I really want to have guinea pigs as a family pet, we've all agreed to it! The only trouble is that we really don't know if we want a group of guinea pig sows or a group of guinea pig boars. Can someone please help us? We have heard of one boar and...