A little background, I have 2 girls, sisters, I have raised from babies, eyes and ears closed and not fully furred. They are 4 years old now and named Fievel and Butters. Fievel has always been more loving and needy, Butters more independent and wanting less contact. They share a cage together and get out for a minimum of 3 hrs a day to run around the room and play.

On to my problem. The last 2 weeks whenever they are out Butters is randomly charging, chasing and attacking Fievel, and not in a playful manner the first time she was vicious and made Fievel pee on herself. I thought the bahavior was just a fluke. She hasn't injured her as of yet, but it's heartbreaking watching Butters go after her sister like this. She doesn't do it every day but it seems to be getting more frequent. They have been fine when in the cage it's only when they are out that Butters behaves this way. Does this mean butters wants to be on her own? Should I do a soft release? Butters has also gotten to where she is attacking my hands. So it's becoming difficult to do anything with her. Please help!