Basics
One type of allergy that is particularly troublesome for animal lovers and dog or cat owners is the so-called pet or animal hair allergy. This is a hypersensitivity reaction to various tiny body secretions of our pets.
The confusing name suggests that you are allergic only to the hair of the animal, but this is not the case, because you are also allergic to particles such as saliva, sebum, sweat or urine, which are secreted by the animals.
These secretions from our animals contain protein molecules to which a sufferer can have an allergic reaction. Since these proteins are mainly found on the hair of the animals and are also spread via this, the name animal hair allergy is not entirely wrong.
Especially if the allergens get into the respiratory tract or into the eyes, there is usually a strong allergic reaction - this can express itself in conjunctivitis, hay fever or asthmatic attacks.
Allergies to typical pets such as cats, guinea pigs and rabbits are the most common, but allergies to other rodents (rats, mice hamsters) and to birds, horses and cattle are also known. With dogs it depends mostly on the breed whether one reacts allergically or not. Fortunately, allergies against dogs are rather rare.