Wears or licks the hair off?
Maggie, the new, used, dog arrived with a bare left front paw from licking (?anxiety?). I would apply udder balm when I thought of it. Over the weeks, it all grew back, but front time to time, she licks one paw or another to bare skin; then it grows back.
She's still kinda spooky, but well settled into her new pack of Tinker and me.
Young Bert used to have raw spots under his eyes from going through thick cover. As he aged, he did it less. Treatment was the same, some udder balm.
Best wishes.