Have you contacted the breeder you got him from to let them know about all of these problems?
Also, Capstar is an immediate flea destroyer available through the vet, though he may be too young/small. I would strip and debug all your bedding and keep him far away from any upholstered, carpeted areas of your home until he is flea free. Spray everything, including areas of the yard and bathe him with a rotenone shampoo. Fleas can remain dormant for an eternity and reinfest easily.
The bad breath is not normal and may be a sign of illness, or caused by the wormer or related to feces ingestion, which will reintroduce the worms. Keep a very close eye on him for further problems.
Make sure you begin bite inhabition/socialization training now, since he was removed from his litter mates too young to learn correct behavior.
Best of Luck! |