Leg bands can be used with quail, their size is a bit smaller than a pigeon I believe - I was looking them up but decided against it just because it was a cost that I didn't need to incur, I don't have too many birds and am a kajillion times better at telling quail faces apart than people faces - lmao it's true!! It gets embarrassing sometimes when I don't recognize someone I've seen a hundred times.
Some consolation is that Jane Goodall goes through the same thing, but could easily tell apart hundreds of chimpanzees just from their faces
I have no experience with chaff, in fact I had to look it up
I will say I prefer wood shavings over hay. Although they are similarly priced (huuuuge almost hay bale sized bag of compressed wood shavings at TSC for like $7 Canadian), the shavings win hands down for absorbency.
It REALLY cuts the feet cleaning down to nearly nil for me, but my cages are several feet long with only 4 or less birds in them since I've switched so there's a lot of places for them to poo and have it dry before someone steps there again.
I also noticed while the feet may have poop on them, the wood shavings have never stuck to it and it doesn't clump. The birds seem to take care of it themselves because I'll see one with a poopy foot it just mashed in a turd and yeah there's wood shavings in it too but it is like it dries it off to fall off the foot? Because then I will see them several hours later and the foot will be nearly all clean.
I used hay and it was leafy so it was more absorbent, then our last bales we could get were mostly hard husk that you guessed it, didn't absorb/help dry the poo which led to hard dried cementy mucky feet too often.
I even tried chopping it up into a couple inch bits so I could rake it/turn it once or more a day to help keep the wet poo out of the way of the birds feet. It's was very tedious, time consuming and only marginally more effective
I've also considered the wood pellets used for horse stalls but have yet to try them