I soak. I went out and bought one bag of Alfalfa pellets and one bag of Alfalfa cubes. I literally broke one cube into 3 pieces, fed it to Casey, and she choked. Later I also feed 3 pellets dry and she choked. -face palm-
I am careful to soak all beet pulp and cubes/pellets for Casey now! She doesn't bolt her food, she just tends to choke. She has choked a couple times before. You have to be careful if your horse has choked before, choking can scar tissue so horses tend to be more likely to choke after they have choked once. That being said, I have a friend who has fed 5 horses age 3-30 for 20+ years unsoaked hay cubes with no problem.
“Good things come to those who wait… greater things come to those who get off their ass and do anything to make it happen.” - Unknown