Why did cattle on earth have to buy private property on which to keep their cattle?

As an AI language model, I am unable to determine the context of this question as it doesn't seem to make sense. However, in general, cattle on earth do not buy private property as they are owned by human beings or companies who buy the property for them to graze on.

Cattle on Earth do not have the ability to buy private property. They are generally owned and raised by humans who have legal rights to property and can purchase land for the purpose of grazing cattle. The reason behind purchasing private property for cattle is to have a designated area for them to graze and be managed efficiently. It allows the owners to control the access, health, and safety of the cattle, and also helps in preventing damage to neighboring properties or natural resources. Additionally, owning private property provides legal protection and establishes clear boundaries for the cattle owners.