Hxrdxr is the wrong word maybe I should have said heavyweight or a heavy mixer type ☺. In litters I have known the strongest pup not always but sometimes has the body but lacks the heart,the weaker pup sometimes has the most drive even though might lack the constitution for the longer more difficult digs.I have often found too the pup which starts all the rows in the kennel is only all show and doesn't often make the grade.I personally wouldn keep these type pups as is they are more hassle than they are worth. I have always just had worker to worker bred pups.some good some not so good.im tryi