My new chicks

[Kleonaptra]

I think they are about 4 weeks old. I'm starting to think the one looking up at the camera is a roo. He's always apart from the others. He stands up to me when I go in. I've started playing with him a bit, letting him peck me and play fight my hand. Should I be doing this, or should I treat him like a colt?

 

[Kleonaptra]

I can't seem to get the pic to upload

 

[Kleonaptra]

Got my pic up. This was only taken a few days ago and they are already so much bigger. They were rescued from an Easter school fair by a friend of mine, she thought they were two weeks old and Ive had them nearly two weeks now. Their light went out the other night and it was our coldest night so far this year - Im amazed they survived!

My little roo beast (I call him Shatter) jumps at me flapping when I go in. Ive moved them from my brooding box into a corner of the laundry.(Because he was jumping out) He also jumps and flaps at the other white one. This is my first time raising more than one chick so I dont know if this isv normal or not. Any ideas on breed? I think the little one is an isa brown but Im not sure on the bigger ones.