As the name implies, roosters are used to summon souls. In ancient times, people thought that birds were the carrier of human spirit, and some places even thought that birds were human souls, so the rooster, as a bird, assumed the responsibility of evoking souls.
In most cases, the soul chicken will be released after the funeral, but the customs in some places are different. Some places will kill the soul chicken and bury it with the dead, while others will kill and eat it.
However, it is rare for ordinary soul chickens to kill or eat. It's usually released. There is a saying that the crow of the buried soul chicken will bring good luck to future generations, and future generations will have a bright future and a happy life.