Has anyone used a Hay Mulcher?  

As in like a tree mulcher where you put a flake in and it chops it up for you !?!  No, but would be very interested!! I have a couple horses with allergies and this would be amazing. Lol 

Yes like that.  I have a 32 year old and cannot chew up the hay but I think he would do okay with chopped hay.

I see at tractor supply you can buy " Chaff" hay which is already chopped. But they spray molasses on it. It's pretty expensive and you would have to feed so much of it. I wonder what would happen if you put a bale through an actual tree mulcher. 

I also have a 32 year old and I soak (more like drown) his food in water, he also does not do well with hay. Leaves those little balls of grass and hay everywhere. I have tried the chopped hay in the past, but he choked on it. Now I give him some hay to munch on (and ball up and spit out, lol) and I add alfalfa pellets to his food/mash which seems to work well with helping him hold weight.

Pro tip if you dont already, let it soak in WARM water in the winter time so you dont have to wait so long for it to become mushy enough for him to slurp up :) 

Yes I do that already also plus he gets the Omega/Omnis Cubes that are softer and they actualy do not have to be soaked.  I have all this hay leftover now and I just thought a mulcher would help him chew better.

We ran some thru a feed grinder off and on over the years with good luck. Dad just did some for the old mares and I think it cost him a 100# to grind 800# of alfalfa and mix with his ration.