The silvervine sticks are very sturdy and durable. Your cat will use it to gnaw on and stop tearing into other items around the house and play with them for hours. If you have a stressed cat, these are great for them teething or teeth must-have cleaning. A must have in your house! These are a funny toy when you give the cat chew toy to your kitties, the cat can have a healthy life. The cat toy is durable and safe, a great way for him to satisfy that urge to bite and chew without you constantly buying toys. Your cat will fight with it, roll on the floor, chew it, then it, and have fun with it for a long time.