My parakeet Ozzy isn't acting right. We have only had him since Christmas and I'm new to owning caged birds. He was fine earlier today but when I got home from work I noticed he was all puffed up so I got him out of his cage and he wasn't flying all around like he normally does. When I checked his body over his vent had no feathers around it and was dirty. Anyone know what it could be. I don't have the money to take him to a vet so any advice may be helpful.