Animal Allergy: No Hypo-Allergenic Cats or Dogs Make an Appointment Refer a Patient Ask a Question Reviewed by Sanny Chan, MD, PhD (November 01, 2016) Some people say there are breeds of dogs and cats that won't trigger allergies. However, there appears to be a major dog allergen found primarily in the sebaceous glands in the skin of dogs. The allergen is very sticky and clings to shed skin and hair - which means the animal's hair is the carrier, not the source. Every dog breed that exists shares this allergen. All other warm-blooded animals with fur or hair (rabbits, gerbils, hamsters, horses, and cats) produce similar allergens. When animal hair is shed on sofas or carpets, humans pick up the dander when they come in contact with it. Although a person may say their own dog doesn't cause an allergic reaction but other people's dogs do cause a reaction, it's difficult to determine how much of this is real and how much is perceived. But there is a minor difference between dog breeds. Chihuahuas may produce a lesser amount of the allergen and golden retrievers have more. But this is only because one is small and the other quite large. No breed is entirely free of the allergen. Breeds that shed less - like the standard poodle, for example - are not allergen-free, but they do leave less of it behind. It’s not necessary for the animal to be present in order for a person’s allergies to be triggered. Dog and other furry pet allergens can linger in a house for a year or more after the pet is gone. Allergic individuals may experience symptoms caused by dander from pets that inhabited their houses before they did, especially since dogs or cats are present in 70 percent of all households. Up to 10 percent of the general population, and 40 percent of people who have been diagnosed with allergies are allergic to dogs and cats. Additionally, between 20 percent and 30 percent of people with asthma also have dog or cat allergies. In fact, a recent National Institutes of Health study concluded that 30 percent of all asthma cases are attributable to cat allergies. Washing a dog twice weekly decreases the allergic protein in the air, but this isn't very practical. You could get a certain breed to try it out, but it's hard to give up a pet once it lives with you. The best solution is to avoid having dogs and cats if you find you are allergic to them.Anyone who has already been diagnosed with allergies to anything at all should think twice before getting a furry pet. Animal allergies can develop with exposure even in previously non-allergic individuals, taking up to 2 years to develop after the pet’s been introduced. Cat Allergies Cat allergies are more common—and often more severe—than dog allergies. Cats lick and groom themselves frequently. The saliva that accumulates on their fur can dry and go become airborne, causing allergic reactions when it’s inhaled. And cat dander is smaller and stickier than dog dander, so it’s easy for it to accumulate on porous surfaces. People often unwittingly transport cat dander from place to place on coats and shoes. Allergic individuals have been known to have allergic reactions to cats just from working with cat-owning coworkers carrying cat allergens on their clothing. View Allergy Home Animal Allergy: FAQ Animal Allergy: Reduce Exposure Clinical Trials For more than 100 years, National Jewish Health has been committed to finding new treatments and cures for diseases. Search our clinical trials.