I have had a racoon reaching through the chicken wire and pulling the chicks through, have had a crow fly down and carry off a baby chick and I have had the mother hen eat them, so sad but true
Also make sure they have enough room to get away from the heat if needed. And one more suggestion I have been raising chickens for a long time and the healthiest chicks are the ones who are able to get on the ground and eat some dirt and plant matter dont be afraid, the hen who hatches her own...
Get them on the ground, I have raised hundreds of chicks and the one who get on the ground always do alot better, somthing about getting grit in thier system. So dont be afraid get them some dirt
I have hatched hundreds of chicks and if they get cold they will huddle and if they get hot they will spread out, just make sure they have room to escape the heat if it gets to hot.
I am starting to use leg bands only because I think I can remember the date they were born only to forget about 6 months later. Leg bands are great ex a green leg band could mean a 1 year old chicken a red one might mean a 2 year old ect
Most definatly get them on some antibiotics for cocci. Im not a big fan of antibiotics but in the cornish x you got to do what you gotta do to keep them alive, you will see a differance very quick. And like the other poster said get them some yogart, I prefer some Probiotics from your local...
Keep the pullets away from the mean hen once she draws blood she becomes a cannable, once the pullets get bigger and the hen still picks on them take the hen and put her in a private pin for a week or so
The chicks go through stages, when they are a few days old they arnt afraid, after that everytime I go in the pin you wouls think I am killing them, and this lasts for months and finally they come around.
I hatch hundres in the summer, I keep a light on 24 hours a day for 2 weeks after that they are on there own unless the weather gets cold. Make sure the chicks have plenty of room to get away from the heat,