I have a syrian hamster and he's been really vocal in the last month, he makes occasional noises while he's in his hutch sleeping, but when i play with him after a while he doesnt stop making noises and is consistent. He isn't aggressive at all, he's never bitten me and when i put him back in his cage because i thought he might be in pain. He still wants to play. So is there something wrong, I've read a bunch of stuff that said hamsters arent vocal at all so could he be in pain or is something wrong. I have a recording of the noises he makes. And he doesnt appear to be angry and he's not clicking. I leave my window open so could he be cold?