Behavior General Behavior International Cat Care: Great resource with information on natural cat behaviors and how to deal with behavior problems Indoor Pet Initiative: Behavior advice from animal behavior experts at Ohio State University Cats International: Covers a number of issues Introducing Cats American Humane: Introducing Cats to Cats Denver Dumb Friends League: Introducing Your New Cat to Your Resident Cat Kitten Behavior Cats International: All About Kittens ICRA: 7 Good Reasons to Adopt Two Kittens Together Cats and Claws Cats International: Scratching and Declawing SF SPCA: Paws and Claws HSUS: Trim Cat Claws Litterbox Issues / Inappropriate Elimination / Spraying Cats International: House Soiling ICRA: Inappropriate Urination, More Serious Than an Attitude Problem SF SPCA: Litterbox Basics Tompkins County SPCA: Litterbox Problems Cornell Vet School: House Soiling Feline Play Aggression / Overstimulation With Humans Cats International: Aggression to People SF SPCA: Play Aggression SF SPCA: Over Stimulation Petting Aggression Best Friends: Cat Aggression Toward People Maricopa County Arizona: Cat Aggression toward People Feline Aggression Towards Other Cats Cats International: Aggression towards Other Cats Best Friends: Aggression Toward Other Cats Shy/Fearful Cats SF SPCA: Fearful Cats Alley Cat Allies: You’re the Proud Owner of a (Formerly) Feral Cat—And She’s Hiding Under the Bed Overcoming Stress Cats International: Overcoming Stress Door Darting Cat Behavior Associates: Dealing with Door-Darting