4 week old chicks, EE's and marvelous mixes

[emjay]

These chicks are 4 weeks old this weekend.
Curious if anyone can hazard a guess, they are EE's and Marvelous mixes, daddy definitely carries the blue genes (the EE roo is daddy to them all), so, not sure what color eggs the mixes will lay. Hoping for an olive layer, but, I think the Australorp x baby is a boy.

one on left, from Buff Orpington/white leghorn one on right from Blue EE (she lays blue eggs)

mom is a Silver Laced Wyandotte, I'm hoping it would be a girl, but, sadly, I think this is a boy.

\\same baby as above

this was the last egg to hatch, mom a buff orpington/white leghorn. she's an odd little thing.

australorp baby

better front view of SLW baby

top left is from a Barnvelder color bantam type girl

mom, buff orpington/white leghorn, I was hoping she was going to be a peach color, but, she's/he's going darker . wah.

 

[emjay]

bumping, because I'm curious about possible sex and if anyone has a guess on what their end color may look like.

 

[lovinlife]

They're cute! I don't have any guesses about gender or color. They change so much at this stage, it's hard to say. I'm curious about how they'll look when they get older, though.

 

[emjay]

some of them really puff up and fly at each other too, hoping that doesn't mean roo all the time.

I am hoping at least half are she's. I want to keep the girls.

what age can they go outside? weather permitting.
and what age can they go with out heat.