with last year i lost my meat flock White Rocks and dark cornish to deises. this year i lost them to picking echother to death as i cannot put 100 birds in seperate pens to let them heal i culled them. I AM NOT INTERESTED IN CORNISH ROCKS FOR MEAT! so far my white leghorns have fit the bill for Fryers but i need a larger bird for roasters so i was wondering what birds are high tolerate to deises and are not agressive?