We have a 4 year old wire-haired Dachshund (Frida) and a 2 1/2 year old Pit Bull Terrier (Maya). Frida and Maya have destroyed, within an hour or two in most cases, every chew toy we have purchased. Even the Kong Extreme couldn't survive Frida's chewing. We have returned items to our local pet shop and the sales people just shake their heads in shock when they see the damage done by little Frida. Well, Frida and Maya have met their match in the Tux. We purchased two of these and had little hope they would survive our dynamic duo. Frida and Maya have had this toy now for 3 weeks, and except for surface scratches, the Tux has been practically invincible. (I am shocked that another reviewer's dog was able to chew off a piece of the Tux because if Maya and Frida couldn't do it, I didn't think any dog could.) Anyway, Frida and Maya just love the Tux. They play with it and chew it endlessly, and particularly love it when the inside is filled with yogurt and frozen. Yummy! The Tux gets our highest rating and we will now purchase other products in this line.