Hi all. I just have a few questions. We bought some chicks to raise for eggs. I got 5 pullets. 1 was a smaller breed than the rest, but I can't remember the breeds. Well, we've had them since Wednesday and last night the littlest chick started falling over and acting really weird. She wouldn't stay standing. This morning, she was dead and 2 other chicks started doing the same thing, falling over. 2 hours later they were dead. I'm down to 2 chicks, who have been fine all day, but I'm worried they might die too. Any ideas what's going on? I have them in a big plastic tub with about a half inch of wood shavings, a heat lamp about 1.5 ft above the tub, fresh water and food. I have changed the wood shavings once since I got them. I really don't know what's going on. I tried googling it, but could only find stuff about grown chickens. Any advice would be appreciated! The shavings are the off white color. The tub they are in is 1.5 ft high, by 2 ft long, by 1.5 ft wide. I started the lamp at the ceiling, but when the little one starting acting sick, I lowered it bc I thought she was too cold. Thanks!!