It could be about a large and majestic rooster. Maybe it's a story of how this giant cock was the king of the farmyard, ruling over all the other chickens. He might have a bright and colorful plumage that made him stand out even more.
Once upon a time, there was a little chick. As it grew, it ate a special kind of magical feed. Day by day, it grew bigger and stronger. Its feathers became more lustrous and its body grew at an astonishing rate. Eventually, it grew into a giant cock, standing tall and proud in the farmyard, crowing to mark its newfound size and strength.
There could be many interpretations of a 'first giant cock story'. It might be a story related to a large rooster in a farm setting, where this rooster was the first of its kind with some extraordinary characteristics. For example, it could be the first rooster in a particular farm to grow to an unusually large size, and there could be a whole story around how it affected the farm life, like scaring the other animals or becoming a sort of local legend among the farmers.
I'm not sure what exactly you mean by 'giant cock story'. If it's about a big cockerel in a fable or a real - life encounter with a large male chicken, that could be interesting. Maybe it could be a story where the rooster was very big and had some heroic deeds in the barnyard, like protecting the hens from a fox.
Well, it's not a typical kind of story you'd find in the general realm of literature. Literary works usually deal with human experiences, emotions, and social issues. This 'giant cock disorder story' doesn't seem to fit into those common categories, so it's likely not common at all.