Along with Lorraine's suggestions I would get socks on his feet. I've cut the tips off of old socks before and used surgical tape to attach the socks to one of my rescue's paws (he was scratching excessively). Maybe by keeping him from chewing his pads for a few days that would give them some time to heal.
As posted above, I used the tips of old socks, but I know they do sell socks for dogs.
__________________  ~Ruby, Reno, Razz, & Jack~ |