Scratchex, maybe? It's not very cheap, look to burn a 20 for a few bottles. Is it on his back?
I had a dog with bad dandruff and itching. Ended up with heavy-duty cocoa butter every few days. Musk daddy + cocoa butter, oh boy!
Give him a bath and he'll still smell like himself within a day or 2...IF he doesn't get out and go roll in sheep shit or whatever it was he used to roll in that was so stinky. Damn! And he loved it!
Then you're there hosing his ass off after you gave him a bath a couple hours ago and ...whtf did he find to roll in?! A damn dead possum or something?
Motherfucker come back with a back full of shit! Stinky shit! He was a character for sure. Fucking neighborhood dogs come around asking if he can come out and play n stuff.
He was a big ol' short wide black pitbull that liked rap music and thumped his tail to the neighbor boys' bass.
He'd lay in the driveway thumpin' his tail to the beat all kinds of happy.