What gender and age are these new chicks? And how to introduce them to my other 9 week old chickens?

[Silkie Walker]

I recently got three new chicks to add to my chicken collection. I got them from IFA so supposedly they are all pullets, but I'm questioning one. Also they are bigger then most chicks at the stores around here, so I'm not sure of their age. What do you think? (and sorry for the bad quality pictures - I have to use the camera on my phone) This is a Golden Campine. This is the chick that I'm questioning if it's really a pullet. The comb is slightly larger then the others and tilts a bit to the left. Do you think it's gonna be a roo or is that just the breed? Also what age? This is a Barred Plymouth Rock. Age and gender please? This is a Rhode Island Red. Age and gender please? Just a few more questions. I have four other chickens. They are about 8 weeks old. They look like grown chickens accept they are smaller because they are younger. One of them is a little Roo (he's a Bantam). With that in mind, when can the chicks be in the same coop as the older chickens? At the moment the chicks are in a crate, and the other chickens can see in the crate so they know the chicks are there. Also, say the one chick is a roo, can I have two roos together, or will that cause problems? I can have roos where I live so that isn't an issue. Please let me know what you think.

They look about 2 or 3 weeks I can't tell gender unless I hold them.

 

[farlo4]

Update: Tonight when I locked the chickens up for bedtime, I opened the door to the create and let them interact with each other. Actually, I think it went pretty well. Each of the hens had to go in and give the chicks a peck or two, but then the hens perched up in their corner and went to sleep. The little roo didn't do anything - he completely ignored the chicks like they weren't even there. I shut the chicks back up in the crate of course; I'm not putting them together unsupervised.

 

[farlo4]

Another update:

Well now the tide has turned. The roo does NOT like them. The hens (or pullets? What age do they change to hens?) are adjusting; they laid down next to the chicks like they weren't even there. The roo, however, seizes every opportunity to peck the poor little guys, so now I'm on "guard the chicks from the roo" duty whenever they are together. It's actually kind of funny, because whenever he starts to get close to them I say, "Mo! No!" and about 80% of the time he listens and turns around. (His name is Mo, fyi)

One of the hens (the Buff Orpington) seems to be more interested in the chicks then the others. She sat and watched them play with a string for a while and then joined in after a bit. She doesn't seem to be pecking them unless she's chasing them away from the food or something, and even then she's not pecking hard. She doesn't mind them walking next to her. I'm hoping she'll decide to start guarding them from the little Roo soon.

Another of the hens (Blue Andalusian) tolerates them. She'll let them be in the same general area as her, but if they get too close she pecks them to make them go away. She actually laid down for a minute and let them groom her tail, but then they started walking on her and she only tolerated that for about five seconds before chasing them away. It was kind of cute, though.

The other hen has shown absolutely no interest. She does sits on the other side of the coop and ignores everyone.

Here's some pictures: It's red because there's a red heat light on for the chicks.

Both the girls watching the chicks.



The Buff watching the chicks.



The Buff playing with the chicks.



The Buff letting the chicks stand by her.



The chicks climbing on the Andalusian before she got irritated and chased them away.