Why are cats allergic to fur? - briefly
Cats are not actually allergic to fur; rather, they can be sensitive or allergic to certain substances found in cat fur and dander, such as proteins called Fel d 1. These substances can cause an immune response in some individuals, leading to symptoms like sneezing, itching, and watery eyes.
Why are cats allergic to fur? - in detail
Cats are not inherently allergic to fur, but rather to certain proteins found in cat dander, saliva, and urine. These proteins are known as Fel d 1, Fel d 2, Fel d 3, and Fel d 4. When a cat grooms itself, it distributes these proteins throughout its fur. People who are allergic to cats react to these proteins when they come into contact with them, either through direct contact with the cat or from inhaling airborne particles containing these allergens. The misconception that cats are allergic to their own fur arises because the allergen-carrying dander sticks to the fur and is subsequently transferred to people and surfaces. The allergic reaction in humans is not due to the fur itself, but rather to the proteins that accumulate on it.