I don't think it's too good for them, but as long as you put a small amount in a spot where the dog can not lick and also not around the face and you don't apply it directly to the skin and you don't do it too frequently I don't think it would hurt much.

When I want to "re-fresh" my dogs I just wipe them down with good smelling baby wipes.
If that doesn't do the trick and they still smell it's either time for a bath, ear cleaning, food change or vet visit because something else must me wrong.