Sheltie and Maine Coon Cat Wrestle

My sheltie is all grown up now, but he still hasn’t learned to leave the cat alone! My cat Tug knows he’ll get tackled if he comes in the family room, but he won’t back down either, so we have fights like this all the neither of them ever seem to get hurt! (Since so many people comment on it, the item on the floor near them is a pig ear!)