Your Wyandotte is definitely a rooster, as young Wyandotte females almost never have such red/prominent combs and wattles. The red patches on the wings (pullets would have a more uniform color) is also a sign of a cockerel. I'm pretty sure that your Cochin is a cockerel, too, as again, that is a lot of comb/wattle for a 12 week old pullet. I'm sorry that your birds are not what they are supposed to be.