A word of caution...
My filly choked on shredded beet pulp a few months ago. It was my fault.
I usually put her scoop of pellets in the feeder first, then I put the scoop of (dry) shredded beet pulp. She'd use her nose to mix it up, getting through the pulp to the pellets. That particular day, the scoop was in the beet pulp so I put that scoop in first with the pellets on top.
Well, it appears she ate the pellets first and since she didn't use her nose to mix the two, she ate the beet pulp all at once and it got stuck in her throat. I noticed it within 10 minutes of her 'choking' and called my vet, who came out right away. Probably 35 minutes from choke to vet arrival.
We had to use a tube up Q's nose to pump in water and flush the water/pulps back out the tube. Poor Q was compacted pretty good, vet felt it was blocked from about lower-mid neck to nearly her stomach.
Good news:
Vet said there was so little blood from the tubing and we treated her so quickly that she didn't think any damage had been done.
Then she checked out Q's stable and feeding arrangements...
My vet advised me to raise Q's pellet-feeder to at least chest height. It was on the floor and with Q's head down and dry pulps trying to go up...it was a recipe for disaster...
She asked about Q's feeding habits, and Q does take big 'bites' of the feed, so vet suggested I break a salt brick in half and toss that in her feeder to have to eat around.
Vet also said I could wet the feed, but if I was sure to mix the pulps with her pellets that she shouldn't have any problems. I did put in about 12 oz of water with the pellets/pulps for the first week after the choke episode at the vet's suggestion, then she said I could cut back the water and see how she did with it dry, and she did fine.
Certainly this won't happen with every horse fed shredded beet pulp, but it is what happened to me. I like the feed because of its high digestibility and carbohydrate makeup. Q's choke episode hasn't scared me off of beet pulp, but it has made me more aware of how I feed it to her.
Heidi