I have an older quail that gets around but site more often than not. I haven't had a quail with bumblefoot and since she's from my very first flock a year ago, I don't know if I need to cut nails (and is that part of regular maintenance?).
That doesn't look like bumblefoot to me. Her nails definitely need a trim, however. A brick or other rough stone that they can walk on will help grind the nails down, but I find that older birds tend to get overgrown nails more often since they are less active.