CHICAGO (AP) — A Natural Resources Defense Council report indicates the use
of dogs to harass gulls has helped reduce water contamination levels at
The border collies being used at the beaches are trained to distinguish
gulls from other birds. They are used from dawn to dusk to chase away gulls,
the droppings of which contribute to E. Coli contamination.
According to the NRDC, the use of dogs in 2008 at Jackson Park in Chicago
resulted in a significantly smaller percentage of days on which water
contamination exceeded state standards.
When collies weren’t used the following year, contamination levels climbed,
and in 2010, when the collies were used again, levels fell again.
Chicago Park District spokeswoman Zvez Kubat says the dogs will be used
again this year at South Side beaches.