I cannot think of an explanation for this trend:

The number of Americans hospitalized for dog bites almost doubled over a 15-year-period, increasing to 9,500 in 2008 from 5,100 in 1993, a new government study reports.

The increase vastly exceeded population growth, and pet ownership increased only slightly during the same period, said the report’s author, Anne Elixhauser, a senior research scientist with the Agency for Healthcare Research and Quality.

Is this a healthcare utilization trend? Is the rise of “how to” dog training TV shows to blame (I’m looking at you Cesar Milan!)? Is it a trend in the kind of dogs that people are owning, i.e. a shift to more aggressive breeds? What is going on here?