I think it depends on your definition of mash. We've been experimenting with the different types of "scratch" available. I didn't like the first kind we tried - scratch grains - because there was a type of seed in it that my chickens didn't eat, so it was wasted.
Next we asked for cracked corn, when we should have said we wanted chops. This cracked corn is more powder than anything. I tried once to feed it to my chickens as is. When they couldn't figure out what to do with it, I mixed it with warm water and they love it! Now that's how I feed it; mixed with the water, yogurt, or like this morning a combination of other soft foods.