My spaniel had developed a large crack in his pad which he started to nibble. I got him this and I can thoroughly reccommend it.
Natural canine skin care. Amazing products for dogs skin problems
Its anti-lick, I applied it in the morning and evening along with a treat for two days and is has all but disappeared. I applied it the third morning and it seems to have gone completely. Exellent product. Its an anitseptic/moitsuriser/protector paste designed to replace moisture in extremely tough, hard and cracked skin.

they do a second product designed to help large skin areas recover say from scratching or a mite infections. The pictures they provide show just as quick results.
Just to mention the crack in his paw was a good 1 - 2"s and was very deep. Am made up with it lol