Just a follow up: broody hen took to the surviving two chicks and has defended them against the others. When I went out to separate the mama to be from the babies and turn on the heat lamp the babies were chirping under her wings so I let it go. Thank you for your help.
Broody hen was sitting for what I thought was 3 weeks I did t really keep track. I put day olds under her but left the other eggs thinking she would realize they were duds. Well she didn't realize that so I removed the eggs and left the baby chicks. Next day two chicks were squashed under her...
That page says no longer can be found. Bummer.
How do you actually give them the antibiotic? In a syringe? Mix the powder in water fill syringe give to chicken?