Peetie Wheatstraw said in
rec.pets.dogs.health:

Any suggestions on how to break the licking habit?

Older dogs seem to easily turn licking into an OCD. Rocky likes
licking the floor, a lot.

Licking can also be an indication of discomfort, and not just in
the area the dog is licking. I doubt this helps, but it's an
observation.

--
--Matt. Rocky's a Dog.