Hey I have a mother hen who has 3 week old chicks. I’m new to letting a momma hatch eggs. At first I left them alone just in the nesting box while all the babies hatched and one of my other hens got ahold of a baby and killed it so I moved mom and babies to a dog kennel in the run with everyone else. They are 3 weeks old now and I’m wondering when am I able to let them all out of the kennel and just be with the flock?