Hate to sound like a snob but only purchase the organic, hormone free chicken breasts and for whole chicken only Murrays which is free range. Do not care for the chickens from chicken mills. Same with eggs, Organic from free range chicken only. Higher choline value in those than from the egg factories.
Well my $0.02.
Same reason for protein powder only purchase the top tier product. Remember that famous unofficial test from a few years ago about fillers in protein?