Background:
For years, people believed that having pets in the house—especially furry ones like cats and dogs—would increase the risk of allergies and asthma in children. Families with a history of allergies were often told, “Don’t get a pet, it’ll make things worse!”
But recent research from Norway is flipping that idea on its head.
The Study in Simple Terms:
A group of researchers in Oslo followed over 2,500 children from birth to 4 years of age. They wanted to see if living with pets early in life was linked to a higher or lower chance of developing allergic conditions such as:
- Asthma
- Allergic rhinitis (hay fever)
- Atopic eczema (skin allergies)
- Bronchial obstruction (wheezing or breathing difficulty in toddlers)
What They Found:
- Kids who grew up with pets were actually less likely to develop allergies like atopic eczema and allergic rhinitis.
- For asthma, the link wasn’t strong enough to be sure, but the trend was similar.
- The risk of bronchial obstruction (wheezing before age 2) was slightly higher in homes with dogs, possibly due to increased exposure to infections rather than allergies.
- In homes with cats and dogs, the concentration of allergens in house dust was higher, but this did not necessarily translate into more allergic diseases.
Why Could Pets Protect Against Allergies?
Researchers think that early exposure to pet allergens may help “train” the immune system, making it less likely to overreact to common environmental triggers. This idea is supported by other studies that found kids raised on farms, surrounded by animals, often have fewer allergies.
But There’s a Catch:
Some families with allergies may choose not to have pets in the first place. So, part of the results might be because of who chooses to keep pets, not just the pet exposure itself.
Takeaway for Parents:
- Having a pet in your child’s early years might lower their risk of developing certain allergic diseases.
- Of course, this doesn’t mean everyone should rush out to adopt a dog or cat—but the old advice of “no pets for allergy-prone families” may need updating.
Reference:
Nafstad, P., et al. “Exposure to pets and atopy‐related diseases in the first 4 years of life.” Allergy 56.4 (2001): 307-312.
Fretzayas, Andrew, Doxa Kotzia, and Maria Moustaki. “Controversial role of pets in the development of atopy in children.” World Journal of Pediatrics 9.2 (2013): 112-119.