My 2 yr old standard schnauzer will chew through anything.  I've been searching for a bully stick that will last more than 20 minutes with her, and still haven't found one.  For some reason though, she plays with this toy differently.  Handles it gingerly and is more interested in playing catch with herself than tugging and tearing.  That said, this is the first non-animal-part toy that has lasted more than 5 minutes.  It has become her favorite over the past 24 hours, which is 24 times longer than I thought it would last.