I've had my chin for about a month now, and he'll occasionally (every few nights) bark maybe five times then completely stop for the rest of the night. Last night he got minimal play time (15 minutes) and went on a barking frenzy around 2 am... like wouldn't stop for five minutes. I would go out and check on him but he was really reserved and didn't want to play. I ordered him a wheel today because I think he's been bored at night, even though he has a huge cage and lots of toys. Will the wheel help? Was he maybe frightened by a noise? I can't have him doing this every night.... it's jeopardizing my sleep!!