Hiya. Yes my Archie does have warts and lumps, but as yet, he hasn't really bitten at any of them. He has chewed at his (removed) testicle area which left him sore for a day, but that was a one-off for some reason. He sleeps a lot more now that he is on these tablets, but at least he is not having the 'scratching' spasms whilst he sleeps. I have decided to give him 8mg daily now as he does have a few 'scratches' per day.
However, I am more and more convinced that these spasms are caused by his hips becoming brittle(?) and failing him, which cocker spaniels do suffer from, and a nerve is trapped in that region..... but I aint no vet! lol