If you have a Greyhound who starts limping, one of the first things he should beGH corn checked for is corns on the pads of his feet.  Since corns only occur in Greyhounds, this diagnosis is almost universally missed by a veterinarian not used to treating this breed, and, unfortunately, an unnecessary, unsuccessful and expensive bout of xrays, therapies, and medications may ensue, Here is a resource for acquainting yourself with this frustrating, but manageable, condition: Grassmere Animal Hospital.