Like Babbie said, eating a tac can be dangerous. It can damage some organs. My dog has never eaten anything sharp so I have not done it before, but get some plain cottons balls and feed it to your dog. Pray the cotton wraps itself around the tac preventing any damage to the organ while it pass through the system.
Personally, I would take him to the vets.
Good luck and I hope the tac pass through his system all right. |