Other sites of interest include:
The American Veterinary Medical Association with a wealth of information.
The ASPCA Animal Poison Control Center with information on how to poison proof your home, lists of toxic and non-toxic plants and instructions for dealing with poisoned animals.
Dog Infomat, an excellent source of general dog-related information;
American Animal Hospital Association site with an extensive Pet Care Library, including pet first aid information;
The Merck Veterinary Manual , a comprehensive veterinary reference book available online free of charge.