I would first strongly suggest you take Skipper to your Veterinarian for an exam for this problem. He may need an xray. If I were to guess and remember this is a guess, not a medical diagnosis which SHOULD BE DONE BY YOUR VET, it sounds like maybe a pinched nerve problem. Does Skipper jump for frisbees or balls at this age or was their an injury or yelp during play or jumping before this started? It's not a typical problem you would see in a 10 month old puppy so again I strongly very strongly urge you to see your Vet.
