I tried a wheat-based litter once, and it was a disaster. Then again, I have weird cats

. Despite doing a gradual change-over, one of the cats started eating the litter as soon as I got to 100% wheat litter

. It got in her belly and swelled up, causing her to vomit. I was not willing to keep trying to see if she would stop as I was afraid to risk doing any real damage if it were to really swell up, or get in her intestines and cause a blockage (apparently there are cases of this in rabbits, not sure about cats).
Her
cat food doesn't have any wheat in it, but I guess she still recognized the wheat smell as food?? Dunno, the other cat didn't do it.
So, that was my short adventure with the wheat based litter. I use recycled paper litter now (PaPurr, for a funny play on words).