Eat the coward BEFORE other predators get it. the boss just doesn't want him to get near his girls... so save you and the head cock the anxiety and eat that coward, otherwise boss cock will just chase that coward all day every day. They are really good tasting.
From your pictures you posted your vent examination will not cause any damage. Where the damage occurs is when you get too aggressive in spreading the vent. Too much spreading and side, top or bottom pressure can cause the intestine to come out of the Cloaca. This will cause prolapsed vent...
It appears threads that discuss unconventional chicken sexing techniques like "brush their back end"(not their vent) is not your cup of tea. My sincerest condolences for you. Personally I find vent sexing day old chicks a little more cringe worthy than "doin all that". I just finished vent...
That squatting when you come up on a hen fast, push down on their back, brush their back end and then they they do that shake move like a dog shaking when they get wet, is the breeding squat & shake. They do that when a male breeds them. It is pretty accurate for sexing, but some males will...