my philosophy on dogs is get them fit, get them out and get them on. if a dogs not carrying any injuries that are preventing it from running its best or striking then you have to accept its something thats going on in the dogs mind thats causing it to hold back or not strike. not working the dog might make it keener for a short spell but il bet money as soon as you start grafting it again regularly it will fall back into whatever pattern suits it best. lots of work is the best way to suss out a dogs style it sounds to me like the bitch prefers coursing it does happen i heard of a dog years bac