My dog absolutely went nuts! He is a medium sized working breed! He chewed on it so hard, that the first rope was gone within 5 minutes! Ok, so they gave me another one. I put that one on the next day, and it was also gone so fast! I didn't find all the pieces so I expect to find some in his stools! So far so good! Once the ropes were gone, he continued to swat it around, like a cat, and he chewed on it. Since the hard plastic is surrounded by what seemed like thick rubber, I wasn't worried. At the end of the day, I decided I had better charge it up. That's when I found that he had literally removed the rubber cover, and was chewing on the hard plastic! After I got the rubber cover back on, I went to plug it in, and found that he had bent the usb-c port! I took a small pocket knife and was able to straighten the pin in that port, and am able to charge it tonight. But I really was hoping that, for $20, I would have some mental entertainment for him that would last more than a couple days! I gave this a 3 star review, because I realize that my dog just might be too psycho for any toys like this. I bought a thick blue rubber football squeaky for him months ago, and he loves it still, and still chooses to play with it, so I guess I'll just have to keep looking for things to mentally tire him out!