Hi puppies are very sensitive their first few months of life... try feeding him the food that the breeder had him on and slowly mix in his new food. Also coax him into eating and CALL THE VET. ...
Dogs do not get worms from chocolate but easily die... so that's really not a good idea. He probably has worms or needs to have his anal glands expressed by a groomer. Take him in soon.
My german shepherd can not seem to get the hint about crate training. She knows that outside is where she is supposed to do her business because at times she will go sit by the door to go out. She...