Veterinary Schools in the US  
This is a great link to all of the websites of veterinary schools in the United States.

USDA Animal and Plant Health Inspection Service
The USDA maintains this website with information on a variety of animal health related topics, including the latest news on such things as Mad Cow Diseases, foot and mouth disease, and many other things.

American Veterinary Medical Association
This site is a good starting point to learn more about a variety of topics, including feline injection-site sarcomas and the latest subjects in veterinary medicine.