I am a soaker. Weigh out a pound of cubes in a decent sized container. Cover them with water. Come back in 15 minutes and cover them with water again.
Look at how they expand after water has touched them.
That's partly why I soak them - I don't want the digestive system to have to do that.
The other two reasons I soak them clear down to mush:
1. My two mid-20's fellas have molar issues, one has four of them missing
That all being said, don't soak them longer than 20 minutes in the heat as they honestly could start to ferment.
I soak them at the house, so I don't have to worry about running right on schedule to feed. My horses know they're getting breakfast and supper, they're just not sure what part of the hour