The only protection (not that it's 100% foolproof, every farm has snakes and every farm has lost pups/dogs to them, it's just an unfortunate part of life and nature that you can't absolutely prevent from happening) is bird netting laid on the ground around the kennels/pup yards. I've done that, however I hadn't done the race kennels area as I never imagined snakes would go into there as Im always working out there, making a lot of noises etc.

After today, I've put bird netting around the race kennel areas. I've also been told that putting mothballs/napthene flakes on the ground can deter snakes but that is no good to me, as I have 2 retired greys that have the run of the place (and in my home too lol) and don't want them to eat those.

Another piece of advice I also got was to lay out mice/rat poison (in pellet form inside a cardboard box) around the kennel area to kill off the mice, as the snakes love mice!