Our favorite websites:

Veterinary Partner (http://www.vspn.org/)
Database of articles on general veterinary care - unusually comprehensive and up to date.    

American Academy of Veterinary Nutrition (http://www.aavn.org)
This website has several good links for further information on nutrition.

American College of Veterinary Nutrition (http://www.acvn.org)
Shows list of all ACVN diplomates. 

Veterinary Botanical Medicine Association ( http://www.vbma.org/)
Professional association of veterinarians and herbalists trained and interested in herbal medicine. You can find a veterinary herbalist closest to you by searching the referral listing.

American Holistic Veterinary Medical Association ( http://www.ahvma.org/)
Umbrella organization for most holistic veterinarians.  You can find a holistic veterinarian closest to you by searching the referral listing.

American Association of Traditional Chinese Veterinary Medicine
Publisher of the American Journal of Traditional Chinese Veterinary Medicine ( http://ajtcvm.org/ )

American Academy of Veterinary Acupuncture (http://www.aava.org/)
American constituent of the International Veterinary Acupuncture Society. You can find a veterinary acupuncturist closest to you by searching the referral listing.

USDA Food Nutrient Database (http://www.nal.usda.gov/fnic/foodcomp/search/)
Search thousands of individual food items and prepared foods for calorie count and nutrient content

AAFCO Ingredient Definitions  (http://naturapet.com/tools/ingredient.asp?alpha=A)
From the Natura web site, definitions of all AAFCO feed ingredients found in pet foods.

Healthnotes Online (through GNC) (http://library.gnc.com/healthnotes/Welcome.aspx?lang=en)
Great site for information on herbs and supplements although only for people.  Look for the links on herbal remedies and vitamin guide - the reviews are relatively up to date and evidence-based.  Do not assume the dose and toxicity information applies to pets, however - always ask your veterinarian about appropriateness for use in pets.