Baby Quail Keep Dying! HELP!

Well, I don't know why I need help because they are all dead now.
I guess I need to know why...I know I probably won't be able to find out though.
Ok, so the first one hatched a week ago and couldn't walk right. It kept falling to one side. He finally died. I was heart broken.
Then I had another hatch, He wasn't very strong to begin with and was lonely. The next day I had another hatch and as soon as it was fluffed up he went into the brooder box with the first. They were both perky and moving around eating and drinking. The last one hatched later and was moved in with them after fluffing. So it seemed I had 3 spunky baby quail. They were all eating, pooping, and drinking. Good right? Well late last night I found 2 sleeping on top of the other one (the oldest one). He looked dead, so I touched him and he wasn't. He lived for about an hour longer. FF to today, the newest hatched seemed weak and sleeping a lot. I tried to get it to drink a bit by dipping his beak into the water (with the vitamins and electrolytes) and he perked up again for a bit. Then just now DS ran up to me asking "Whats wrong with the chicky?" so I looked and he was dying, gasping for air. I checked on the last one, and it was already dead in the box. I'm so confused, they didn't drown. They were dry, and just dead. I don't know what I did wrong?
That was the last of them too and honestly, after my chicken hatch where I lost 3 within 2 days of hatching (still have 7 growing fast and seemingly healthy) I'm just not wanting to hatch anymore. I think I'm better off with someone else doing the hatching. I brooded 6 day old chicks before this without a problem.