Q. My dog ate the corner of a nylabone edible chew. How long will it take to know if there is a problem/blockage/perforation? Its been 3 hrs
A. it can take up to 24-48 hours for a foreign object to pass through your dog. Depending on the size of the object If its big enough to cause concern I would have your dog examined by a vet asap. If you feel the piece was small enough pay close attention for any signs of vomiting, dog looks bloated or distressed, dog vomits after eating or drinking, dog refuses food or water those can all be signs of a blockage and you should get him veterinary care immediately.