Got a small for my mid size spoodle when he was a baby.Though some token interest was shown initially - each time fleeting - the main attraction was that it bounces irregularly and you never know where it is bouncing to and puppy loved to chase and pounce on it. Didn't really catch on either but because of the size, puppy did token chew on it a little after catching it.Better than the dentals.psDo not leave outdoors, we lost it for a few months on the shady side of the house which gets sporadic son - it has faded a little and is showing miniscule scaly cracks.Love the concept though, just pooch prefers the natural eg soft bones etc