Tecnically, the Sun, because the Sun transfers it's energy to plants through sunlight and plants transfer energy to cows through digestion.
Cows actually do not make food. Humans are responsible for that sector of the economy.
Cows can get food on their own when they are out on pasture. The act to which they are able to do so is called "grazing."
The same type of food that all other cows eat.
the probing of cows
Cows and dogs have different feedstuff requirements, thus there is no one food that contains vitamins (or any other nutrient) for both cows and dogs.
Cows make milk from eating grass.
the cows digestion takes 8 hours to digest the food or cud
No.
humans depend on animals for there food because a hamburger is made out of cows so we need the cows to make the hamburgers
Carnivores in the food chain would eat cows. This is because carnivores eat meat and cows have meat in them.
Hay.
Digesting food.