Kamadhenu is also known as Nanda, Sunanda, Surabhi, Susheela and Sumana.
One who gives charity of a bull becomes famous even in swarga – Mahabharata
One who donates a cow becomes free from in and achieve liberation for 14 generations and family members. Mahabharata
The cows ar mother of all living beings and giver of earthly pleasures – Atharvaveda