The dog may have an infection under the nail. Take him to the vet.
The area which a dog is confined to may be the culprit. If the dog is unable to clean himself because of mud, then more of this...
What you can do is: 1. Put your dog on a leash2. Grab some treats3. Take your dog to the road4. Give your dog a treat every time he/she doesn't move or lunge at cars5. Keep doing this for a couple of...
It grows back people. Unless its infected a doctor cant do anything for your dog. How do I know because my dogs both ripped their skin off their paws, the black part. It literally fell off. It just...