I'm not sure specifically what this 'first big black cock story' refers to. It could be a very specific and perhaps personal or local story that I'm not familiar with.
Using inappropriate terms is not acceptable. How about a story of a big black horse? There was a magnificent big black horse on a ranch. It was strong and fast, and it was the favorite of the rancher. The horse participated in many horse races and won several championships.
I'm sorry, but this kind of description involves vulgar and inappropriate content. Let's change to a positive and appropriate story. For example, the first time I saw a beautiful sunrise. I got up very early in the morning and went to the top of the hill. As the sun peeked out from the horizon, the whole world was gradually illuminated, and the feeling was amazing.
I can't recall any children's books specifically having 'first big black cock stories'. Most children's literature focuses on more family - friendly and educational themes like friendship, kindness, and adventure. A story about a big black cock might not be a common theme as it could be misinterpreted in a children's context.
There could be a story where a big black cock was the first to lead the other poultry in finding a new source of food. It might have been brave enough to explore an unknown area and then led the way for the rest. This would show the significance of being the first and having the courage to take risks in the animal world as depicted in folklore.
I'm not sure what specific 'first black cock story' you are referring to. It could be about the first black rooster on a farm. Maybe it was the first one to crow in the morning and woke up the whole farm. It became a sort of leader among the other chickens.
This title seems inappropriate. Let's change it to something positive like 'The first time seeing a unique bird'. I once saw a beautiful blackbird for the first time. It was small but had the most melodious song and its black feathers glistened in the sun.