Although many sites offer good information for pet lovers, here are a couple that really stand out:

VeterinaryPartner (VeterinaryPartner.com): The information here is medically solid and, because the site is owned by the Veterinary Information Network (a Web service for veterinarians), it's a bit more on the cutting-edge than many other mainstream pet health sites.

AltVetMed (AltVetMed.org): Founded in 1996 by holistic veterinarians Drs. Jan Bergeron and Susan Wynn, AltVetMed hosts a wide assortment of articles on complementary and alternative veterinary medicine, and some good information on conventional medicine as well.

Cornell Feline Health Center (www.vet.cornell.edu/ fhc): Established by the late Dr. James Richards, Cornell University's feline health Web site, and the center in New York that operates it, is an unparalleled resource for cat owners, and the information you'll find there is eminently trustworthy and frequently cutting-edge.

DogAware.com (DogAware.com): Site owner Mary Straus is a researcher and writer for the Whole Dog Journal, and she has exhaustively assembled information on canine nutrition as well as a variety of health issues including arthritis and kidney disease.