I caution against too much handling at a young age because they are are fragile & you can't get children not to do it if they see you doing it. Of course I handle my chicks but as little as possible. They are not toys. I give them interaction by wiggling my fingers in their bedding. They get very excited. I break up meal worms & drop them on them. Also I use a babies medicine dropper to dispense water the first day by placing on beak. After that they flock to it almost as if it was a treat. I do this the first week or two. They tend to miss me if I'm not around. By the time they are old enough for their run when I sit on the ground with them they will think of me as protector till the become adapted. I was up till 10pm with them putting them up. They came to they door waiting to be brought to their cages. They are my babies. I have frizzles, sizzles, ducks, meat birds, assorted pullets, & a few other. Bantams in the brooder. I'm ready for a break.
About the hay. I've used regular hay. I just hate pine shavings how they get in the water, food & I know the chicks eat the stuff. I have a full bag in my shed that I will probly use for mulch. I bought to use in the brooder for my meat birds (the superpoopers) 2 days was all I could stand of pine shavings. Then they got regular hay. Keep in mind that the Alfalfa hay comes wrapped in plastic & should have no parasites. I just love the stuff. I payed 17.00 for a bail last week. The price keeps going up