Personally I wouldn’t worry about it. If your chickens are eating real food and not sick or seeming like they are hungry, then why bulk them up? What chickens are we comparing them to? Chicken feed is a more modern thing anyway, so I ask myself what did chickens eat on for the previous thousands...
We got 14 new chicks in the mail 3 weeks ago. 1 died within 48 hours... lethargic and couldn’t stand. We thought it was trauma from shipping. Then last week another chick started losing use of her legs and eventually stopped moving around. I suspected Marek’s so we isolated her in a different...