So I just got a new rat today for free from Petsmart (he's been there for a long time and nobody was taking him so he was free), and he's big and heavy. I got home and tried taking him out of his carrier, but he started squeaking when I touched him and tried to pick him up. I don't know why and I was wondering why he did that. I managed to take him inside to introduce him to my first rat, and he seems very scared right now, but they seem to be getting along for now. I gave him a bath because he smelled pretty badly, and I noticed that there were orange dots on his fur and I noticed that his skin seemed "old" looking, so I can guess he's an old rat, but I'm not sure. Are the orange dots normal? After he got dry, the dots disappeared and his skin seems normal again. Is he an old rat or new or is it just how he is? He's bigger than my current rat. He seems to be adjusting now at least.