what's the difference between mash and crumbles. we have 14 layers and 1 roo, all enclosed together. always fed crumbles til this past week when i found a feed store that made their own feed, cheaper! thought i hit on something great, but noticed first of all, 50 lbs. of mash is not the same as 50 lbs. of crumbles by volume, and it's got more moisture in it so it doesn't flow thru my feeder as well. is there a nutritional benefit to it? they seem to like it though. at $9.00 a bag it's got me thinkin'.