Hmmm...never gave it much thought. But you could use Bag Balm and massage it in to soften the skin and lessen the dryness. I've used it on paws when I lived in cold climates.
Thanks guys. My dogs have never been overweight (believe it or not) I can be quite neurotic when it comes to weight issues.
I spoil my dogs by giving them mats and towels and blankets to lie on, very much with the hope that it will prevent calluses, in addition to just wanting them to be comfy.