I don’t know what to do with my dog’s unusual digging. When, playing fetch in the grass or beach, he will lay the object on the ground to shake, go potty, etc. when he goes to pick it back up, he doesn’t like getting grass or sand in his mouth, so he tries to dig around it, thinking he will be able to pick it up without getting sand in his mouth. Of course, it doesn’t work. I don’t know East to do to get him to quit. HELP!