Okay, I found a little more information and I'm 99% sure that this is a scam. Here is a website for a company that does the same type of testing on human hair:
The Intolerance Testing Group
The hair is sent to Europe for testing (yeah, right) because these tests aren't done in the United States (I wonder why?). The website has typos, and says that they test the DNA in the hair. Note: There is currently no DNA test for allergic reactions.
Here is a website that debunks this type of testing:
Allergy tests of no proven value
Here is a quote about testing hair for toxins and allergies:
Hair Analysis Testing in Allergy
Hair is analysed for allergies in two ways. First of all, the hair is tested for toxic levels of heavy metals such as Lead, Mercury and Cadmium and then deficiencies of Selenium, Zinc, Chromium, Manganese and Magnesium. There is no scientific evidence to support the hypothesis that these heavy metals have any bearing on allergic diseases. Hair samples are usually sent away for analysis and numerous studies have failed to find any accuracy in hair analysis diagnosing allergies [1]. Another hair test is called Dowsing. The dowser swings a pendulum over the hair and an allergy is diagnosed if an altered swing is noted.