I bought my rat Moby from a pet store where i live, and i know that it isnt the best place to get a rat, but after he calmed down a bit, he turned out fine. moby's been fine up til now, but he has always been pretty solitary, which should be expected. Anyway, ive gone back into the same pet store that i bought my first rat in, and got my second rat, Tidget. i was worried how moby would react in seeing tidge for the first time, but he seemed fine for a while. moby likes sitting on my shoulder, and tidge is quite adventurous, and moby turned really aggressive towards tidge when he came near. yet still reacted normally to affection from me. i was aware that this would probably happen, but moby is now refusing to let tidge into his cage, or any other areas he considers his. What can i do?? ???