My opinion on studs has always been use them when theyve finished running anything can happen with young digs and I wouldnt like a litter off a jacker but this bitch belongs to me dad shes not mine he picked his dog to use because hes seen him run on dvd when ive been out with it and because he's treble bred all same lines as bulldozer jim and vics bitches everytime me dad breeds a litter they make the grade call it luck or knowledge but thats what happens and I wish him luck with his pups