I'm not a dog owner and know next to nothing about them but am puppy sitting a family dog for a little while. He's a gorgeous dog and mostly well behaved but the last couple of days he's taken to biting us and really hard. The dcs won't go near him now and, while I know he's probably teething and needs to bite and chew how can I get him back interested in his toys and not sinking his teeth into my leg or foot? Owners are incommunicado or I'd ask them. Thanks.