Looking after a very chewy small dog with sharp teeth. His owner supplied a rubber spiky ball which lasted about 2 minutes. I was throwing the ball for play, not giving it to him as a chew, but he had chewed it to bits by the time I got to him. He loved chasing it, but it isn't safe. He has yak chews which he loves, so ample opportunity for chewing. 8 months old so has all his adult teeth.
TIA