We manage to groom her now all over - along her back, bum area, behind ears etc she stands there while we feed her treats and brush her. But I am not sure how to brush the tummy area. I can’t get access to it and she is prone to knots. Does anyone have top tips. I haven’t managed to get her to learn the “lie down on your back” command. It seems a complicated thing to teach. Would it help if she has her front feet on a couch maybe so we can get underneath?