When he was first with us dog did quite a bit of growling and biting. He eased off and has been a really good dog lately. But just in the last week or so he has started having episodes of going into a sort of trance and snarling and biting quite hard.
We are all arguing with each other over how best to deal with it. He won't be distracted - not with treats or toys. I can't manage to put him in "time out" because he rolls onto his back and I can't drag him without hurting him (he is a golden retriever - and a large one at that).
At the moment he is sitting quite peacefully, having just drawn blood on my leg 10 minutes ago.
Please help!