ben is still nibbling at his back

i cant even turn my back as hes nibbling at his back, so now other than his walks hes got the buster collar on.
hes still on his painkillers, i was told to get him down the 1/2 in the morning and 1/2 at night, but had to put it back up to a full one at night. hes on glucamine (sp?) and a cod liver oil cap (peirced )
so going to ring the vets 2morow and get him back in. got to pick up some more tabs for him by next week.
he just waits for us not to be watching and he nibbles.
im going to give him a good combing get any lose scabby bits off (sorry if your eating)
hes got no lodgers had a good look.
ill let u know how he goes
hes still on little n often walks. but chasing the fox last night didnt help.