It was recommended on another cat forum, possibly this one:
http://www.thecatsite.com/t/260271/chicken-crumbles-as-cat-litter
I'm still determining how long. After a month I'm still mainly smelling the chick crumbles. And yes, it works with an ordinary scoop. It's not quite as fine as most clay litters, so sifting is a bit slower. There are occasional pieces larger than the scoop slots, but it's a very low percentage, >1%.
What I read kind of freaked me out and that was the bugs someone had...I saw someone recommend Best Cob Premium Horse Bedding that she said clumped better than the crumbles...I may try that instead...