A novel with a cow as a mount and pet

There were many novels that described the protagonist bringing a cow as a mount pet, such as the Nine Nether Bull Python in Battle Through the Heavens and the Black Bull in the Legend of the Herding Gods. These novels usually described the interaction between the protagonist and the cow, and the protagonist gained great strength and skills through the help of the cow. There were also some novels that regarded cows as intelligent animals, such as the Green Bull King in the Demonic Sky Story. It could help the protagonist solve various problems. In these novels, the protagonists would usually establish a deep friendship with the cow and use the power of the cow to help them complete their tasks.