When we talk about hypoallergenic dogs, we mean that they have a less or reduced tendency to cause allergies or allergic reaction among allergy sufferers.
It has been estimated that about 10% of the US population is allergic to animals (American College of Allergy, Asthma and Immunology). Symptoms of the reactions can range from watery eyes to dangerous asthma attacks.
The problem is not with the pet's hair. It is the dander, or microscopic scales of dead skin (similar to, but much smaller than the dandruff on the human scalp) which pets are constantly shedding that is the cause. They are so tiny that you seldom know that they are circulating in the air or laying on the furniture and carpets because they are so small.
Here is a list of Hypoallergenic Dogs. If I have missed any I do apologize.
American Hairless Terrier
Chinese Crested (hairless)
Kerry Blue Terrier
Portuguese Water Dog
Soft Coated Wheaten Terrier
Spanish Water Dog
West Highland White Terrier
Wirehaired Fox Terrier
Please remember that no dog is 100% hypoallergenic and also that allergic sufferers react differently to each separate breed of dog.
For Westhighland Terriers owners, such as myself, the news is good. They are considered good for allergy sufferers, with a relatively low dander (ranked number 7). However you need to be reminded that one person's allergies may vary greatly from another person. It is always advisable to visit the home of the dog you wish to have, before you bring it home. I hope that you found this article of use to you
Good health and happiness
(Disclaimer: Any information contained in this site relating to various medical, health and fitness conditions of Westies or other animals and their treatments is for informational purposes only and is not meant to be a substitute for the advice provided by your own veterinarian. You should not use the information contained herein for diagnosing the health of any animal. You should always consult and check with your own vet or veterinarian.)