Q. My American bully has a rash on his neck , I noticed it at 9 weeks it wasn't that bad I use malacetic but doesn't work he is now 4 months and it isbad
DAVID ELBEZE, DVM, MRCVS
A. You need to get him checked by a vet for skin parasites, as it needs to be ruled out before starting other treatments (antibiotics, steroids).
Bear in mind it might also be a bad kin allergy. These conditions may be difficult to treat and frustrating at times. The allergy might be caused by food so it's important to put him on a high quality food which is hypoallergenic.