Grass is difficult to digest. That is why a cow chews an average of 50 times a minute, a total of around 30,000 times a day. Even when we humans try our best, we usually don't chew a bite more than 30 times. Cows produce a good 150 liters of saliva a day. That makes you very thirsty, so they drink a lot of water: up to 180 liters a day. This corresponds to a large bathtub that is filled to the top. If you are very thirsty, you can drink as much as 25 liters per minute. The figure is suitable for children from 3 years.