If all those allergic to cats are wondering why they can be around dogs but not cats, then there is a simple answer according to Dr Mitchell Hecht of the Philadelphia inquirer, and that is Dander.
It isn’t the hair or the fur that is causing the allergic reaction to cats to appear; rather it is the dander on the cat that is the culprit.
It’s a substance much like human dandruff and it is in fact the shorter haired cats that cause more of dander to proliferate in the air around them when they groom themselves.
If double the number of people are allergic to cats when compared to those allergic to dogs, then it is dander that is the reason. It is important to control the dander by good animal hygiene and perhaps medication as well.