I always add a couple flakes of alfalfa and give a snack of soaked feed if they will eat it. I did increase 1 tsp salt to 2tsp of salt to try and encourage water intake. My pony is loving his warm water though. So far no colic’s but my previous vet in NC had 3 colic’s called in last night.
If your horse isn’t used to eating alfalfa, it keeps things moving and soft.
I’m also bedding deeper since pee and poop are freezing. Nothing like laying in a frozen pee spot. I usually do 4-6", now I’ve got at least 10" of shavings plus banked on sides.