He plans to butcher the cocks.
The coop has excellent ventilation as the walls are built using steel wire mesh. So ammonia buildup won't be an issue, provided he cleans the coop regularly.
My dad built a 60 sqft loop with no outside ran and put 30 chicks in it. There is absolutely no way to add an outside run. My question is what will be the consequences of Iow space? Chicks are all vaccinated with 10 out of them being male.