If you have any questions or concerns about poisonous plants, chocolate, holiday candy, Christmas tinsel, etc., that your dog or cat may have ingested, you can contact ASPCA Poinson Control at 1-888-426-4435. There will be a charge, so please have your credit card ready.
This web site has a lot of useful information on cats and kittens.
Novartis Animal Health
This site is sponsored by Novartis, the makers of Sentinel, Interceptor and Program, and has useful information on heartworm prevention and flea control for pet owners.
Heartworm Society Everything you ever wanted to know about heartworm disease can be found here!