We have our two Cayuga hens in the coop with everyone else. We just kept them in a separated spot for a month when they were around 4 months old (which in my opinion was a little long to wait) and then we tried it out to see. Do you have a rooster? Ours tried attacking the ducks when they were younger but now that they are laying he wants to sit on them.I would keep them around the chickens, with a separated fence, so it’s easier to integrate than what we did.
I am supposed to have all pullets. I'm eyeballing a couple that are getting pinkish/reddish, one has a little more wattle growth than the other. But then again, I've noticed that some will get flushed/red when they get excited so.... I just don't know.

I'm not seeing anything other than that that screams cockerel to me. So yeah, I was thinking that we could just fence off a section for integration purposes.
I would keep them around the chickens, with a separated fence, so it’s easier to integrate than what we did.
thats in CHICAGO 

The boogers! So we ordered hardware cloth because no one had it local in the amount we needed and that took a while so until we got it in, we went with that silt cloth you see around construction sites. LOL It works great and was cheap enough. We thought about moving the chicks to a dif area because I want to actually BUILD them a decent coop (we just have the prefab atm) so we just never put up the hardware cloth around the area. Figured we'd use it later.

". 
