For kittens/puppies just make sure they can’t lick it off; however, the Nu-Stock company may be able to help you further.  Their number is 877-568-7862. From the developer of this product, it can take anywhere from 3 days to 10 days to get rid of the ringworm.  You have to make sure that the fungus that caused the ringworm is not reinfecting your animal.  This product is great to get rid of it on your pets, though. Apply 1 time every 3 days.