To make 34 litres of milk a day, a cow must drink 68 litres of fresh, clean water.
A cows pregnancy is the same as humans - 9 months.
A Holstein's spots are like a fingerprint, no two cows have exactly the same pattern of spots.
The cow must be a mother before she will produce milk and she will make around 200,000 glasses of milk in her lifetime.
A one year old female calf is called a heifer.
In the top front of a cows mouth, they have a tough pad of skin instead of teeth. They have 8 incisors on the bottom front and 6 strong molars on the top and bottom of each side to grind their food. A total of 32 teeth.
Some people say that a cow has four stomachs. Actually, a cow has one stomach with four compartments.
Two ingredients found in milk that make it really healthy are Calcium and Vitamin D, both are major nutrients necessary for strong bones and teeth.
Cows are usually milked twice a day, once in the morning and once in the evening before the cows go to bed.
Milk is held underneath the cow in the udder and comes out from the 4 teats that are attached.