My senior horse has decided he will only eat soaked hay - which is fine for now, but I don’t know how to manage this going into winter and dealing with freezing temps. He’ll be in overnight with a hay bag and their forage is primarily hay when turned-out in the winter - they eat out of large hay boxes. The water bucket in his stall will get ice when the outside temps are below 20 degrees (F) at night, which can be pretty frequent throughout the winter. Outside temps are also typically below freezing when they are turned out in the morning.
I’ve been looking at some of the DIY hay steamer boxes. If I make this one (https://www.adamshorsesupplies.com/make-your-own-hay-steamer) and can steam a bale at a time, it should be enough for him overnight in his stall plus turned out for the day with a buddy. So if I steamed in the evening, would I be able to leave the remaining bale in the steamer overnight so it’s all set to go outside in the morning?