Go ahead and let your kids roll around in the dirt. Let them pet the animals and muck the stalls.
A recent study published in Science has proven that kids who have been raised with an exposure to common bacteria and other microbes on farms are less likely to develop allergies.
The study showed that only 25% of farm kids in their test group reacted to common allergens — dust mites, mold, pollen, animals. Compare that to the standard 45% of children of the general population who react to the same allergens. What other conclusion can you draw except farm dirt is good for you?
The science behind this conclusion points to a protein some people develop in their lungs, while others others do not. In the study, the protein, A20, was developed by mice who had been exposed to farm dust. Unexposed mice did not develop the protein. A20 develops in the mucous membranes in the lungs.
Read more here.