We gave all of these WPD toys and I can see this will be my 2 year old border collie's favorite. She can chew and chew on it, and not so much as a tooth mark is on it. She slings it, chases it, lays on her back and holds it in the air with her paws, pushes it, and falls asleep with it under her chin. She's in love with it! Thanks WPD for these awesome toys. Please keep coming out with more of them and I'll keep buying them!