Dembre loves his Nylabone keys. I saw a picture of his brother with keys when the litter was together so I assume that he got to play with them when he was little! I got my first set of keys awhile before Dembre came, but it didn't really get used until he showed up. Over the last six months he has chewed them... A LOT! Dembre got a shiny, new Nylabone keys for Christmas and is absolutely thrilled!!! In the pictures above it might be hard to see, but Dembre's old keys have been chewed so much that they would soon be chewed to stumps.