Leahs Mom, I have not fed mash, but have used both crumbles, and pellets. I have only found layer feed in pellet form. I did not find that there was a big savings in the long run by feeding pellets. What I have discovered, is that I needed to keep better control over how I was feeding them.
When I first got chickens, I could not have the coop on our own property, so I rented a space to build my coops, and runs. I developed health issues, and could not go every day to feed them for awhile. I would fill the feeders, so I could go every other day, or every 2 days. Within a month, there was way too much feed on the ground. I cleaned up the excess, and turned the dirt. Again, it was in the back of my mind each time I filled the feeders, that it might be a couple days before I'd return, so I made sure they had plenty just in case. Again, within a month, there was way too much feed on the ground. I didn't want them eating old feed, so again I cleaned it all up.
The difference was that this time, when I would go to feed, I would pay attention to what was on the ground. When I'd go to feed, if there was at least a day's worth of feed on the ground, I'd only put enough for one day in the feeder. That way I knew the feed on the ground was fresh, and if they were going to eat, they had to get the stuff they knocked out of the feeder, onto the ground. It worked. Withing a short time, my chickens had plenty to eat, but I didn't have a bunch of old feed sitting around on the ground. With less waste, I enjoyed some savings, and didn't have to worry about old nasty feed being on the ground.
Another person on one of the threads, said they had much less waste when they used the heavy metal bedpans as feeders. They can put their heads in to get food, but there is only one side they can scratch the feed out, and even on the one open side, it's at an angle, so not all that easy for them to get much out. Being metal, you can not put them in direct sunlight, or they will get too hot in the summer, but in the shade they are fine. You might want to get 1, and give it a try.
IF you want to feed layer pellets, but want to increase protein in pellet form, there is a product called Calf Manna, made by
Manna Pro. It's rather expensive per bag, and you can NOT feed it alone, since the protein level is really high, and it's not nutritionally balanced to be used as a stand-alone feed for chickens. The benefit is that because it's so high in protein, it does not take very much, so a bag will last a long time, if stored properly. I don't add it to the feed, but toss a small handfull as a treat daily. The reason I don't add a little to the feed is that they will dig through the feed, wasting a lot, to get to the calf manna pieces. During molt, it's still best to occasionally give animal protein. It does better for them, than vegetable protein alone.