Chicks from hatcheries are about as safe as you can possibly get. The eggs are laid in a separate facility, washed, and transported to a sterile hatchery where they are incubated. Biosecurity is very tight.
The actual risk is that the hen will give the chicks something. She is the one that has lived in an environment where diseases and parasites are present. This is typically not a problem. They are going to face that environment later anyway, this just gets them started on flock immunities early. This is the same as her hatching the chicks. I consider getting their immune system strengthened and ready for life to be a good thing.
If it makes any difference, the chicks and mama will be separated from the main flock, in our small quarantine coop.
Makes no difference. If your flock has it your broody hen has it. And the chicks need it to work on flock immunities.
The actual risk is that the hen will give the chicks something. She is the one that has lived in an environment where diseases and parasites are present. This is typically not a problem. They are going to face that environment later anyway, this just gets them started on flock immunities early. This is the same as her hatching the chicks. I consider getting their immune system strengthened and ready for life to be a good thing.
If it makes any difference, the chicks and mama will be separated from the main flock, in our small quarantine coop.
Makes no difference. If your flock has it your broody hen has it. And the chicks need it to work on flock immunities.