A dog is running in the waves at the beach.
The pet is laying on the couch.
A pet is not necessarily a dog.  A dog that is running on the beach cannot be laying on the couch at the same time.
A dog can't be running at a beach and laying on a couch at the same time.
An animal cannot be running and laying at the same time. If a pet is in the waves at the beach, it is impossible for the pet to be on the couch.