Personally, I think paper towels or toilet paper is the best flooring to start chicks on. I'm not fond of shavings. Also, chicks are easily affected by outside sources (like the pine shavings). We have strong cocci outside in our dirt and I refuse to let my chicks come in contact with anything outside until they are nearly completely grown. Any kind of bacteria can wear on the chicks and make them sick.
I like to add sugar to their water and poly-vi-sol as well (just not at the same time). It gives them an extra boost of energy and the vitamins do great for their little bodies.
Its mostly hardwood-- oak , maple , beech, I dont think any ceder. Anyway I put down newspaper. These guys seem really healthy. They hatched on day 19 and 20 for the most part. Like I said, they seem really healthy- very energetic.I think they must have been eating the small chips-- that cant be good for their digestive tract this early in their lives , can it??