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Puppy will not walk
Hi - we have a four-month old male jack russell. He frequently refuses to walk on the leash at all. He sits down almost immediately and seems tired. Occasionally he will walk well off-leash. He will always play with another dog when available. Our Lab (now 11) had elbow displasia so we are overly worried that Hudson may have a medical issue - but he is not limping - just not walking! Any advice?