Pit bull ownership has been banned in Miami-Dade County, Fla., since 1989, but some residents are legally keeping the animals as service dogs. "We're seeing a trend in an increase of citizens that claim to have a disability and their pit bull is their service animal. That is a loophole that people have found," a county official said. "There are certainly concerns that some individuals may claim an animal as a service animal when, in fact, it isn't."

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