Hi Neighbor! The deep litter method is not a good plan for baby chicks and frankly, with our very wet weather here, I don't think it works at all because too much dampness builds up in the bedding. I don't raise my chicks with the hens anymore, so I use wood pellets in the brooder boxes for the first few weeks and then switch over to all wood shavings because they are easier to change more frequently. For the mom and babies, I'd just go with the shavings - all wood or pine as mama will show them what to eat (and not eat). Cocci thrives in dirty, crowded and damp conditions, so it is very important to keep chick areas as clean and dry as possible at all times. Lots of breeders put them on wire for this reason, but I'm not set up that way.