I am watching my friends guinea pig for her and put her pigs cage next to mine. They are both males. Neither of them have been too aggressive, only barbering and occasional teeth chattering. But my guinea pig, who is about 1 year old, keeps biting his cage bars. I've read about cage biting, and he's picky so he can't be begging. Also I take him out and cuddle him every time, so I don't think it's attention. Is it aggression? It only started when we got the other one. Please help!!!!!
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