My last dog used to do it but from starting him off on the farm where I lived and worked the hedges were ten foot thick blackthorn hedges that had the sets directly inside them and I think that dog got sick of looking down black holes so he stopped going in. My new bitch does it also she pulls up well clear only acquired this bitch recently but she suprised me last week by running in and taking the bunny as it entered the set. Tonight she run 4 and pulled up at the hedge on every one keeps the vet bills down but it pisses me off. Lack of commitment I think