Gorilla sticks are a type of chew toy that is made out of rubber. They are safe for dogs to chew on, but there are a few things to keep in mind. First, make sure that the Gorilla Stick is the right size for your dog. It should be big enough so that your dog can't swallow it, but small enough so that they can still comfortably chew on it. Secondly, always supervise your dog while they are chewing on the Gorilla Stick, and take it away from them if they start to chew on it too aggressively. Lastly, when the Gorilla Stick starts to get worn down, replace it with a new one so that your dog doesn't end up ingesting any pieces of the old one.