How old are my chicks?

[CluckerMural]

Thinking that the temp in the brooder needs to be adjusted as my chicks age, I am wondering how old my chicks are. I picked up 2 Ameraucanas, 1 Sussex, 1 White Orpington, 1 New Hampshire Red, and 1 Silver Laced Wyandotte. Here are a few pictures. They were all labeled as pullets.

 

[sassysarah]

They look a few days old. They are such cuties!

 

[Amer101]

They look to be about 1 to 2 weeks old

 

[slayerofmyths]

They're a couple of weeks old.. temp should be around 90 degrees after 3 weeks reduce the temp by 5 degrees until ready for the coop.

 

[sassysarah]

http://www.esteshatchery.com/wp-content/uploads/2016/01/white-plymouth-rock-chicks.jpg I don't think that the little grey chick is a white orpington. I think it is a white rock, That is what my white rock chick looks like. Here is a pic I found of the internet. Hope this helps.

 

[Ol Grey Mare]

The amount of wing feathering coupled with no shoulder feathering puts them at a week to 10 days. That said, rather than thinking of it from wks=degrees just follow their behavior and adjust the heart accordingly keeping it as cool as they are comfortable with.

 

[CluckerMural]

From what I had seen so far I was thinking 1-2 weeks, but we are new to this and I figured I would ask first. Thanks for all of the feedback.