The Obama family is searching for a hypoallergenic dog. A first pet-elect!

Ah, but there's a rub: Do such dogs really exist?

First, let's clear the air: It's a myth that people are allergic to a dog's fur. The real problem is usually dander (the skin cells that pets shed), although a pet's saliva or urine can also cause reactions.

And don't tell Malia, but a truly allergy-free dog is just too much to hope for. "All cats and dogs are allergenic to people who are allergic to animals," according to the Humane Society of the United States. A "hypoallergenic" pet is one that is less rather than non allergenic.

The good news: Allergic animal lovers may do better with certain breeds. The American Kennel Club (AKC) says the following dogs usually produce less dander and are generally more suitable for people with allergies:

• Bedlington terrier
  
• Bichon frise
  
• Chinese crested
  
• Irish water spaniel
  
• Kerry blue terrier
  
• Maltese
  
• Poodle (toy, miniature or standard)
  
• Portuguese water dog
  
• Schnauzer (miniature, standard or giant)
  
• Soft-coated wheaten terrier
  
• Xoloitzcuintli (Mexican hairless)

The AKC nominated five of these breeds in August for an online poll to recommend a low-dander breed for the Obama girls. More than 42,000 Americans voted, and the poodle won. "We hope the Obamas consider the survey results," AKC spokesperson Lisa Peterson said. "This poodle is a breed that doesn't always get the respect it deserves, but it is truly an ideal family pet."

What about mixed breeds and shelter dogs, the preference of President-elect Obama, a self-described "mutt"? Allergic daughter Malia has favored a goldendoodle (a mix of golden retriever and poodle), which according to some experts could be a good choice if the puppy's coat assumes traits of a poodle rather than a retriever. There is also talk that the Obamas may be considering an Australian labradoodle, a mix of a lab and a poodle. Shelters do often have plenty of low-dander dogs, including purebreds.

Regardless of how much a hypoallergenic animal is touted, it's best for an allergic family member to spend time with a prospective pet before bringing it home, to see if there are any troublesome reactions before the family becomes attached. If you choose to have allergy testing performed, the best choice is a RAST blood test for dander.

More: See what hypoallergenic dogs look like and vote for the next first pet. Want a furry friend despite your allergies? Check out these six tips for keeping your pet. And learn more about animal allergies.

Plus: Try the Allergies & Asthma message board for coping tips.