I have a 3mo Brahma rooster that has been off for many weeks. I first noticed he would lie down in the grass while feeding. Then slowly his gate was off a bit, next he seemed to lose his balance when running, but never falls just staggers, and he can't roost or jump. He eats, drinks, poops, eyes are clear, no discharge, just seemed to have some brain damage....? I have a flock of 20, all Brahma from the same hatch, the others were all looking excellent, but tonight another roo seemed... lost is a good way to describe it. They have a huge coop, and free range all day, access to water in multiple waterers, are fed a 16% feed (changed in the last 2 weeks from 20%). They get veg scraps, grit, and DE. What am I missing?! No external parasites, these guys look awesome, I am stumped!!! Contacted a vet but I'd like to see what the group thinks or has experienced. I have a closed flock. Now that I reread all this I'm thinking poison maybe...? Ideas...?