I think you've asked me this before a while ago. Anyway, I googled it again and it was hard to find the ingredients but here they are. Having looked at this I think it's a supplement that discourages cocciodiosis rather than an ingestible vaccination as such. You probably know more than me.
I...
Mine quit after a few days of chucking them out of the nest box, maybe even closing off the nest box and collecting eggs laid on the coop floor if they are persistent.
It's never a good idea to hatch chicks just because a hen is broody. You need to WANT chicks. Whether to sell, increase your...