Siberians are often called “Hypoallergenic,” but this is somewhat misleading. There are actually two different issues that should be addressed:
Primary cat allergen: Fel d1 is a very small protein that causes 70% of cat allergies. This is the allergen that we test for. A few Siberians produce very little Fel d1, and these are a wonderful option for families with severe cat allergies.
Secondary Cat Allergens: Some people are allergic to other cat allergens, typically albumin or lipocalin. In our experience, people who are highly allergic to rabbits / horses (or who have severe food allergies to milk / meat) often react to low-Fel d1 Siberians.
Fur samples are an excellent way to start assessing allergies. Holding fur from a tested exceptionally low allergen adult Siberian will help identify whether reactions are to primary or secondary allergens.
Individuals with horse/rabbit or eggs/meat allergies should spend time with a tested low-allergen adult Siberian before purchasing a kitten. Starting in 2026, we will host visitors for testing with our low-allergen adults. The testing fee is $150. We will accept a limited number of visitors, so visits may be scheduled 1-3 months ahead. Email Sarah for a cattery visitation form. Families toward the top of our waitlist may continue to visit at no charge.
Lundberg Siberians / KittenTesting developed a method to take saliva samples from cats to measure Fel d1 allergen levels. These samples are sent to InBio for analysis. From 2003-2008 we worked with UC Davis, studying allergen levels in Siberians and other breeds. We found all cats produced some Fel d1.
Saliva testing must be used for kittens 6 months or younger. Saliva tests tend to be more reliable than fur samples in adult cats, but both are subject to biological errors. Over the last twenty years we have analyzed allergen results from 600 Siberian cats and kittens. Half of Siberians tested had Fel d1 allergen levels substantially lower than other breeds. Roughly 15% of Siberians are suitable for homes with severe cat allergies.
We created a Cat Allergy Chart to help families understand their allergy severity and match their needs to tested kittens. The chart is based on allergic reactions, but is similar to the 1-5 skin test scale used by allergists. Consider how holding a normal cat would affect you. Each level is mapped to a different amount of Fel d1 cat allergen, listed in micrograms per milliliter of saliva – µg/ml.
| Allergen Level Chart © | ||
|---|---|---|
| Cat Level | Saliva Level in mcg | Ideal for people with these reactions to typical cats |
| Extr. Low | 0.1-1.0 |
ER visits, rashes, hives, facial swelling, asthma, airway constriction.
(Note that reactions under 0.12 are likely to be due to dilution errors.) |
| Very Low | 1.0-1.75 | Light sneezing, severe runny nose, swollen eyes, mild rash, mild asthma |
| Low | 1.75-2.5 | Runny nose, eye irritation, coughing, a few sneezes, light itching |
| Medium | 2.5-3.5 | Mild eye irritation, stuffy nose, scratchy throat, other mild symptoms |
| Normal | 3.5-32 | Not recommended for homes with cat allergies |
| © 2005 Meredith Lundberg, updated 2026 Sarah Starr dba Lundberg Siberians / KittenTesting.com. Commercial/social media use of Allergen Level Chart, allergen levels, and allergic reactions by severity are prohibited without direct written permission. Only catteries who have tested through KittenTesting.com in the past year are approved to use this chart, levels, or reaction by severity — or any chart or written information derived from this, including website copy generated by AI. Once approved, any reproduction must include this entire copyright paragraph and the sentence “Used with permission from KittenTesting.com.” | ||
Our articles about cat allergies:
- Are Siberians Hypoallergenic – questions about Siberians and cat allergies
- Reducing Household allergens – ideas to reduce reactions to your pets
- Cross-Reactive Allergens – are you allergic to horses, rabbits, eggs or meat
- Testing with Fur Samples – using low-allergen fur samples to assess allergies
- Testing with Kittens – allergic but wanting to buy an untested kitty