My sister’s got three rats - Willow, Briar and Guenevere. W & B are littermates, but Guen’s from a different litter. They normally get along really well, but sometimes they fight. It seems that two gang up on a third, but all three rats eventually get ganged up on.
Tonight I went to play with them, and Briar shot out of the cage and climbed up my shirt. She had a couple of bite marks on her - nothing major, but she was pretty spooked and is hiding in my shirt as we speak.
What’s the best way to stop the rats from fighting?