Help! Mean Skinny Pig
I have two male guinea pigs in a 5 x 2 c&c cage. Recently one of them has been nipping at the other but it has now turned into full on fighting. He runs and attacks his brother and the other one is completely terrified. It got so bad that the mean one drew blood and scratched him all over and took bites out before I could get him away. I separated them to keep the other one safe but the mean one is now biting my hand everytime I reach into its cage. When I try reintroducing him the same thing happens. I don't know what could be wrong or what else to do.
We adopted them and they weren't exactly sure but they said their best guess was 1 year. They were about 8 months roughly when we got them.