Entire male cats generate the most scent. If this secretion from the scent glands is the allergen, allergic people should tolerate spayed female cats the best. Cats do not think that they are little people. They think that we are big cats. This influences their behavior in many ways.
Cats are subject to gum disease and to dental caries.
They should have their teeth cleaned by the vet or the cat dentist once a year. Cats, especially older cats, do get cancer. Many times this disease can be treated successfully. Most cats have no eyelashes. Many cats cannot properly digest cow's milk.