I’m not sure why you’re getting downvoted, your experience is valid.

50 on 1/2 acre is a lot, but shouldn’t be stomach wrenchingly stinky. Grass certainly helps. Bare dirt would require more upkeep. My 160 were on like 2, and having that many was unintentional but like I said wasn’t particularly smelly at all.

Sounds like chickens aren’t for you, though. There’s a nearby dairy I pass from time to time that smells really bad some days.