Best chew I've found so far!
I struggle to find chews that last any time at all for my Gt Dane but these last her at least half an hour, sometimes more depending on the thickness as they vary. I've recently been sawing them in half as they're not cheap - they still last a reasonable length of time and hopefully long enough to keep her teeth clean. I'd recommend these for medium to large dogs. They're the only chews I've found on ZP that last any time at all... wish you did more chews suitable for XL dogs!! :)