There's no such thing as a "cow bullet." A bullet is a bullet, and it's purpose is for only one thing: to kill.
Because you can milk it.
Yes: to produce milk.
The femur in a cow has the exact same purpose as it does for us humans: it provides support for a bovine to use to be able to move and stand on.
Hindus regard Cow sacred and worship her because it serves the mankind in many ways while living or even on dying.
The hocks on a cow helps to keep their hind legs from touching. Hind legs that are too close together is a common defect in cattle.
A suckler cow is a cow that is raised for the primary purpose of producing calves for beef production. They are typically bred with beef bulls to produce calves that will be raised for meat.
Cows have a skeletal system much like people. The purpose of the skeletal system is to support the skin, muscles and organs of the cow.
Most cow bells were (and are) made from metal, not wood. Sounds from metal travels a lot farther than sounds from wood. But basically, a wooden cow bell serves the same purpose as metal cow bells: for a farmer to easily locate where the cow went, since most cows in the mountain regions are never confined to fenced areas.
The act of conception for the purpose of producing offspring. A cow can only conceive if she's bred to a bull, not another cow. See the related question below to find out how it's done.
Because it's readily available, easy to use and good enough for that purpose.
The noun cattle is a common, plural noun for a group of bovines kept for the purpose of food or labor animals. Sometimes used as an alternate plural for cow (cows).