PBS
Pbs Learning Media: Ruminants
Why do cows chew their cud? This video segment from Secret of Life: "Accidents of Creation" describes the physical adaptations that have made ruminants some of the most important, and certainly the most efficient, plant eaters on earth.
Other
Barnyard Palace : Dairy Cows
Use this site to find out all about dairy cows and how they produce milk. Learn why cows are so important to humans, and check out some excellent cow pictures (click on each picture to make it larger).
Enchanted Learning
Enchanted Learning: Cow
Here you'll find some fun and good information about cattle. Learn about this animal's anatomy, diet, and use on farms. A great diagram is also included.