"We have 2 Danes and a rescued French Mastiff that will drop other toys to chew on this ring. Best thing ever!! We have tons of other Nylabones and fleecy toys that they'll play with, but when they find this one they drop everything... they'll wait in line for each other to finish so they can have a turn chewing on it!! We have gone through... probably close to 5 or 6 of these as they will find a spot and chew chew chew... all three of the them will chew on the same exact spot until they get a hole through it and then it's time to throw it away and get a new one... and that's not a matter of days... it takes weeks of constant chewing - and trust me, they are all aggressive chewers!! Have and will continue to recommend this one to everyone I know!"