It is possible that it may be a blockage, but you'll have to have Casey checked out, an x-ray taken, before you'll know for sure. You'll feel lots better once the vet checks him out He may just be constipated. Is he still eating? Did he show any signs of distress the past day, not acting normally? Best thing is to get him to the vet's and get a definitive answer. Surgery may not be required, so try not to think that far ahead. Often the vet will admit them and just watch and wait and see if they pass whatever might be in there. Hoping for some good news! Lots of hugs and prayers for your dear Casey Please check back when you can. Sandra