Veterinary Partner:
http://www.veterinarypartner.com/

Cornell Feline Health Center:
(Don't miss the link at the bottom of the page to their how-to videos)
http://www.vet.cornell.edu.fhc/

KNOW Heartworms:
http://www.knowheartworms.org/

Calcitriol information for owners:
http://members.verizon.net/~vze2r6qt/calcitriol/

Indoor Cat Initiative:
http://vet.osu.edu/indoorcat.htm

Companion Animal Parasite Council site for pet owners:
http://www.petsandparasites.org/

Feline Asthma:
http://www.felineasthma.org/

Winn Feline Foundation health library:
http://www.winnfelinehealth.org/Health.html