There’s a type of aggression that occurs between cats in the same household after a veterinary visit that can be easily prevented with a little planning. This is the kind of aggression you may see when one cat comes home from the veterinary clinic and is either hissed at or actually attacked. For the unsuspecting cat parent (and for the victim cat) it’s terrifying because it comes out of nowhere and seems as if the cat who stayed home no longer recognizes his best friend. The fact is, the returning cat may look the same (in our eyes) but from a feline point of view, she isn’t recognized because she doesn’t smell the same. That may seem odd to a human but when you understand more about how important scent communication is in the feline world, you’ll see that this behavior, however frightening, is actually normal. Luckily though, you can take steps to prevent it.