My parents have a dog they have rehomed and whilst he's lovely in many ways he humps, a lot. It's very bad for one of my smaller dogs who gets the worst of it, and parents dog is big and v strong / determined and I worried it will hurt him as he really grabs and holds onto my dog. It got really bad the other day when the dog did it to my v young daughter who was on the floor. My parents seem unwilling to tackle it, seek out a behaviourist or take action as he was an anxious dog and they don't want to upset him. But I'm at the point where I'm going to have to stop visiting for the safety of everyone. Does anyone have any advice on how to stop it?