Dead chicks and a lone chick

[TNyardbirds]

So I had 3 chicks that I was keeping waiting to put in the run with the other but 2 does last night. We got a cold front and just couldn’t handle it I guess? They had a heat lamp and almost 12 weeks old. I setup a large brooder in the garage to keep the remaining one till she’s big enough. I want to get her some company. Should I? Or just let her get big enough to move in with the rest on her own

 

[Welshies]

Depends. How long till she moves in with the others? I'd keep her seperated. It sounds like your chicks died not of cold, but of something else.
My 9 week old chicks are all fine in -4°F weather here in Canada with no heat lamp. Even with -40°F weather there was only 1 fatality and that was from segregation.

 

[WildCHILD400]

It's way easier two introduce two together I had two chicks die of paint fumes and one left which didnt seem to mind being alone. I got her a new friend for company which she loved her after a few days. They are only a week apart tho so it's really up to you.