My dogs love these Dino Nylabone's. Over the years I have bought at least 30 of these nylabones for 3 different dogs. Two of which have loved the Dino shaped Nylabones the best. The third loves the nylabone daily dental bone the best but the dino is a close second. The T-Rex is their favorite but they like all dino shapes. Depending on the dog's chewing mood these have lasted anywhere from a month to 6 months before needing replacing. My super chewing husky will chew one up pretty quickly in about a month, my moderate chewing pit bull would take 3-4 months and my slow light chewing shiba inu would take 6 or more months. I typically have 2-3 chewable items per dog (it helps prevent toy hoarding and aggression) and these dino toys are always among the favorites.