As long as it is healthy, not releasing the umbilical cord will not affect the bloodline.
Pigeon is a very common bird, which is widely raised all over the world. Pigeons are the floorboard of hundreds of kinds of pigeons. The pigeon we usually talk about is just a kind of pigeon, which is a domestic pigeon. The most common domestic pigeon is carrier pigeon, which is mainly used for communication and competition. Pigeons have lived with humans for thousands of years. The first pigeon image discovered by archaeologists came from Mesopotamia in 3000 BC, that is, Iraq.