My (shetland) boy Bruno, who is 5 years old, has a bite from one of the other boys on his shoulder
My boys have never did this before, so I have no idea why they are biting eachother. It's quite deep, and there's dried blood around it .... I've washed it up, and cleaned it, does anybody have any further advice? He is not in any pain as such, but his brother Spencer also has a small cut.... I have no idea why they are doing this! Help!