hello, I have two tortoises both I believe to be girls and I have had them for 5 years. However one of the tortoises dominates the other and has been attacking the other tortoise, sometimes taking always it's scales and drawing blood. It has got more concerning as they are behaving like this in their indoor inclosure which hasn't occured before, only when they were outside. The dominating one has also been trying to hump the little one which I am confused about, thinking they were two girls! Please help me because I am very concerned. Thank you!