to look up various pet health topics
Cornell Feline Health Center
Washington State University Pet Health Topics
Parksville-Qualicum SPCA
Humane Society of Canada
Virtual Vet Hospital
Western College of Veterinary Medicine
Ontario Veterinary College
When "surfing" the Internet for health care information for yourself or your pet, please remember that there are all sorts of opinions to be found. People giving advise or opinions on the Internet are not necessarily qualified as professionals or experts. Furthermore consultations are not relied upon over the Internet as the patient cannot be examined. Read through things with a critical eye. Rarely is any of it "gospel" or absolute in terms of truth vs. falsehood. (Consider the Internet as a big coffee shop where you just happen to overhear all sorts of views, stories & tidbits -- some based on fact and some might just be gossip.)
The links we've given here are thought to be good solid sources of information.