As I understand it, not an expert, you can inject it into the egg at day 18 or within 24 hrs of hatch. It won't be effective if given after these times. There's lots of info online about it.
Brooder is built and ready. Coop is being made by local company which donates part of proceeds to charities. I'm making the run once I have the coop to size it up next to.
1) Are you new to chickens / when did you first get chickens?
Parents had chickens growing up. Now a few decades later, getting them again and passing knowledge on to son.
(2) How many chickens do you have right now?
7 chicks hatching tomorrow and then mailed to me.
(3) What breeds do you...