It's been going on because they're guinea pigs and it's normal behavior.
Age has nothing to do with whether guinea pigs can be housed together.
Ear nibbling often occurs when the pigs are crowded. How large is the cage? And are all three in the same cage?
Age has nothing to do with whether guinea pigs can be housed together.
Ear nibbling often occurs when the pigs are crowded. How large is the cage? And are all three in the same cage?