If you no a keeper who can put some wheat in a pheasant pen with the door open to encourage deer in then close the door at the back of them then take one hound at a time in then reprimand it once sorted out take all of them in at once and see how they react,if you do it properly they shouldn’t even look at the deer,don’t use a dead one as there is a different scent from a dead animal to a live one and remember to leave the door open to let the deer go free,when I ran a pack any chance I got when out hunting to go where there were deer I went, you will end up with more places to hunt when hound