I have manna pro gro just because it is the only 18% feed I can get for my angoras without special ordering. I am not overly fond of it, pellet size is large and length is inconsistent, don't notice much dust though, and my grow out rate for what I raise (French angoras and meat mutts) is good. It has no corn in it, which is why i choose it over the other 18% brand the feed store carries and it's only a dollar more, but it still has soy unfortunately. (When you start reading up on soy its pretty nasty unless it gets fermented.)
The stuff I have to special order I do like better, but it is nearly $25 a bag. Its ADM pen pals. Still no corn, can't remember if there is soy or not. The pellets are a consistent size and small, so the kits can hold onto them better when starting to wean and don't drop and waste so many pellets. Good grow out weights. I just don't like to have to pay that much more and special order it. Seems like too much of a hassle, and if I run out unexpectedly (I send transition food with any kit, so if I sell a bunch I run out quickly!) I can't just run and pick up another bag. It has to be ordered and I have to wait a week and substitute with another feed. I don't want to switch feed constantly, so it jus doesn't work out.