[ Jinx ]
Maybe they are going through puberty? You know how teens are. xD ha I'm only kidding.
Anyways, it is possible that your rats got traumatized when you were gone.
You should ask the person who was taking care of your rats if anything happened to them. But it is probably nothing too serious. Maybe just give it some time, they might come around.
I think they just missed me alot. My dad didn't really talk to them or pet them i am assuming. so the forgot how to come when i call them when i am in their cage. They are still not being their old selves but clamor is coming around. I was actually thinking it might be puberty. I got him when he was a tiny baby rat. so it could be.
Oh wait i just figured out they come to "Hey" now. lmfao. What the hell did my dad do to them.