Losing bantam cochin chicks

[Malbri]

I have lost 2 chicks this week, and I'm trying to keep one warm right now in my shirt who I dont think is going to make it. They are in with 3 standard mixes the same age, and 2 silkies and a sumatra a month or 2 older. I have a heat lamp in the coop, and I figured it wasnt cutting it so I lowered it today and added draft protection. The one I have right now didnt seem to be doing to well so I put her next to the water and she drank fine, then went and layed back down under the lamp with her siblings. Not even a half out later she was laying completely flat underneath her huddled siblings. Any idea whats going on? Should I bring the other two bantam cochins inside in my dog crate?

 

[Malbri]

We lost the third. I brought the other 2 inside, along with a standard for company. Right now they are snuggled on a towel in the bathroom but I plan on putting them in my room, but I wanted to check- are candles bad for chicks? I know that some air fresheners are bad, so I thought maybe scented candles may be too. I was burning one earlier and need to find a better place than my room for them if its gonna poison them

 

[sammi]

no aromatics....

how old are the chicks?
what temp are you keeping them at?
chilling effects metabolism of nutrients..
what all are you feeding?
describe the droppings..color and consistency..
check the vents to see if they are pasted..