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The Myth of Hypoallergenic Dog Breeds

Do Hypoallergenic Dogs Exist?

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Updated November 27, 2012

Written or reviewed by a board-certified physician. See About.com's Medical Review Board.

The United States has the highest number of household pets compared to other countries, with over 60% of all families keeping one or more domesticated animals (such as a dog or cat) inside the home. As the number of homes with indoor dogs and/or cats has increased over the past 60 years—before which animals were mainly kept outdoors because they were considered “dirty”—so has the rate of allergic diseases. Allergy to dogs is also common, affecting up to 20% of the population in Western countries. Allergic symptoms related to dog exposure include asthma, allergic rhinitis, atopic dermatitis and urticaria. In an attempt to reduce these symptoms, people with pet allergies who want to own a dog have sought out so-called “hypoallergenic” breeds in an attempt to reduce or eliminate allergic symptoms.

The Concept of Hypoallergenic Dog Breeds

The major dog allergen, Can f 1, is responsible for allergies in most people who are allergic to dogs. Hypoallergenic breeds of dogs are thought to have a lower concentration of Can f 1, and therefore cause less (or even no) allergic symptoms in people with a dog allergy. Examples of dog breeds that are considered to be hypoallergenic include Poodles, Labradoodles and Yorkshire terriers. There is no scientific proof these breeds truly produce lower amounts of Can f 1; this assumption is simply based on the fact that, because these dog breeds do not shed hair, they therefore must be hypoallergenic.

Hypoallergenic Breeds of Dogs: Do They Exist?

A 2012 study by researchers in the Netherlands and Virginia sought to determine if hypoallergenic breeds of dogs actually produce less Can f 1. Homes with “hypoallergenic” breeds of dogs, including Poodles, Labradoodles, Spanish Waterdogs and Airedale terriers, were studied and compared to homes with “non-hypoallergenic” dogs, including Labrador retrievers and various mixed-breed dogs. Hair and coat samples were taken from the dogs, and settled and airborne dust samples were taken from the homes and analyzed for Can f 1 concentrations.

Surprisingly, the amount of Can f 1 found in hair and coat samples was actually highest in the hypoallergenic breeds of dogs, with Poodles having the highest amount of the dog allergen, and labrador retrievers having the lowest amount. These differences did not appear to be related to gender, age, spay/neuter status or frequency of bathing or swimming—although recent swimming (but not bathing) did significantly reduce the amount of dog allergen collected for all types of dog breeds.

When comparing floor and airborne dust samples from the homes of the dogs, researchers found that homes with Labradoodles had lower amounts of Can f 1 from floor dust samples when compared to other hypoallergenic and non-hypoallergenic breeds of dogs. This difference could not be explained by spay/neuter status, age, gender, bathing frequency, house cleaning frequency, or type of floor covering. However, homes with carpeting had higher levels of Can f 1 in general in the floor dust samples compared to homes with hard floor surfaces, regardless of dog breed. There was no difference in the amount of airborne Can f 1 in homes with hypoallergenic versus non-hypoallergenic breeds of dogs.

What's a Dog Lover to Do?

Therefore, it appears that the concept of a hypoallergenic dog is actually a myth, built on the false pretense that so-called hypoallergenic breeds do not shed hair, and therefore shed less allergen. There's never been a study to confirm this assumption, but there are now at least a couple of studies that show no significant differences in the major dog allergen (Can f 1) in homes with hypoallergenic dog breeds compared to non-hypoallergenic breeds of dogs. So for people with an allergy to dogs, the only logical recommendation is not to get one.

So what’s a dog lover with a dog allergy to do? Read about some techniques proven to reduce the amount of dog allergen in the home, as well as some measures to take when you’re allergic to your pet.

Source:

Vredegoor DW, et al. Can f 1 Levels in Hair and Homes of Different Dog Breeds: Lack of Evidence to Describe Any Dog Breed as Hypoallergenic. J Allergy Clin Immunol. 2012;130:904-9.

DISCLAIMER: The information contained in this site is for educational purposes only, and should not be used as a substitute for personal care by a licensed physician. Please see your physician for diagnosis and treatment of any concerning symptoms or medical condition.

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