We bought our Rhodesian Ridgeback dog the root in size L. With a little luck we caught a big piece. Unfortunately, the pieces tend to be smaller and for these dogs are then size too small. The current root is now about 2 weeks in daily use, it is already a good deal become smaller. But so far no major splintering. It enjoys great popularity) We will add to our mix-bitch (45cm high, 16kg) also get a, at least in size M.
It if there were more to buy a XL size would be nice.
