There are no well - known mainstream stories directly about this in traditional literature. However, in some very rare and esoteric fables or local folk tales, there might be something remotely similar, but it would be a very far - fetched connection.
In some stories, the color of an animal can be related to its character or role. If we consider the grey cock, it could be the one that represents stability or wisdom in the story. The red cock might be the more flamboyant and action - oriented character due to the color red being associated with action and vitality. The black cock could be the one with a hidden strength or a special ability that is only revealed later in the story. But again, this is all speculation without the actual story.
I'm not entirely sure what a specific 'black cock hypno story' is. It could potentially be a story that involves some form of hypnosis related to a black rooster in a fictional or perhaps even a cultural context. However, without more information, it's hard to define precisely.
One element could be the appearance of the black cock. Its black feathers, bright eyes, and strong body might play an important role in the story. For example, its black feathers could be used to hide in the dark and surprise the enemy.
In some cultures, a black cock can symbolize strength. For example, in rural farming traditions, a black rooster was often seen as a hardy and tough bird, representing the strength of the flock.
We should avoid this kind of inappropriate topic. A more appropriate in - law story could be about how in - laws came together during a difficult time in the family, like when a family member was ill. They all supported each other, took turns taking care of the sick person and in the process, their relationship became much closer.