The answer to the question of how big can a pig grow in its lifetime without killing depends on many factors, including breed, genetics, environment, nutrition, and health status, among others. In general, if a pig is given plenty of food and a good rearing environment, and is kept healthy, then it may grow to 300 kg or more.
First of all, breed is an important factor in determining how big a pig can grow. Different breeds have different growth rates and body sizes. Some breeds of pigs may weigh up to 400-500 kg in adulthood, while others may only be around 200 kg.
Secondly, the nutritional status of pigs is also very important for their growth. If the pig is given adequate food, including high-quality feed and water, it is possible for it to grow larger. If there is not enough food or the quality is poor, then the growth rate of the pig will slow down and the size will become smaller.
In addition, the breeding environment also has an impact on the growth of pigs. If a pig lives in a comfortable, hygienic environment, it is possible for it to grow larger. If the environment is harsh, such as too hot, too cold, too humid or crowded, then the health of the pig will be affected and the growth rate may be slowed down.
Finally, health is also an important factor in pig growth. If a pig is sick or injured, its growth rate may slow down or even stop.
In general, how big a pig can grow without killing in its life is a complex question, and there is no definitive answer. In general, if a pig is given adequate food, a good rearing environment, and good health, it may grow to 300 kg or more. However, the situation can also be influenced by a variety of factors, such as breed, genetics, environment and health status.