Your best bet would be to have your vet take a look at him. If that rash is due to dog bites, he'll probably need antibiotics. That looks like a right nasty rash, and could be something else - like mange or flea bite dermatitis, all of which need a vet's attention. Enjoy your new pup!
thanks for your advice i am going to take him on friday . iv made a appiontment once again thanks audrey
maybe it could be allergies or he is allergic to some thing my dog had this before we put antibotic on it and it went away