Can anyone tell the sex of this chicken?

[PhantomSlayer]

My sister in law wanted chickens so we built a diy coop and everything. She got the chickens from farm and home store and while most of the chickens we think are hens currently were hoping for one rooster. We've never had chickens before so we can only go based on what we find online. While she's had them 13 weeks I believe they were atleast a week old when she got them she has 5 easter eggers, 4 black sex link and she also got 3 swedish blue ducks and 2 Cayuga's ducks living in the coop as well . So yeah for the chickens we're hoping atleast one rooster and we're thinking of any will be one that's the one. It's always been bigger than the others

 

[nuthatched]

Cockerel. Very Red shoulders is a sure sign of male.

 

[Chickengirl2671]

Cockerel

 

[PhantomSlayer]

Heres some pics of her other chickens. My favorite is the greyish one. Thats my sister in laws "baby". Just figured I'd show them off as well since Waffles (aka the white and red) was posted anyways lol.

 

[Regina Larsen]

Lovely birds!
Are the ducks all female? If you end up with a drake just be sure to keep him away from the hens, he could injure them.
We have a blue swede too just ordered another one (along with a bunch of runners).

 

[PhantomSlayer]

Sorry been busy have looked at the site for almost a month lol. Um honestly its unknown with the ducks so far. I havnt been able to spend much time down there. But today I did get a quick view of how pretty the ducks have gotten. Once my sister recovers from strep I'll find a day to go hang out down there and see if I can tell.