Yeah. i tried that a number of years ago. it worked fine and was, as you might expect, very affordable, being literal chicken feed. There was just one problem, chicken feed attracts mice, so I had to go back to clay litter.No but thanks to someone on this forum I started using chick feed - the crumbles for the baby chicks - as litter and I love it. It clumps, is a whole lot cheaper than the clumping litter, and has very little dust. I get it at Tractor Supply.
These days I use the litter breeze system which I've been quite happy with.