Two of the three are cage mates that get along fine now with each other after one was neutered.The other was attacked by a mental brother repeatedly even after neutering..The attacker will always be a lone rat.His brother is currently alone too as he now has trust issues with rats.They all bite and cannot be handled.I have tried since bringing them home everything that was recommended.Trust training,down the shirt,treats on spoons,carring pouches,sittting and talking to them at the cage.Everything I could think of.They just want nothing to do with me.I think they were happy and settled at the rescue and didn't get over leaving there.I have the two cage mates in the bottom of a double cn and the one lone boy in the top.His brother has his own seperate cage away from them.