Professional dog walker Jon Lovette of Jonny Walkers walks with dogs at Crissy Field on October 19, 2011 in San Francisco, California. San Francisco supervisor Scott Wiener introduced legislation that would require professional dog walkers to obtain a permit that would restrict them from walking more than seven dogs at once and would also need to go through a twenty hour training course or forty hour internship with another licensed dog walker. Additionaly, the San Francisco Animal Care and Control Department would inspect all vehicles used to transport the dogs. (Photo by Justin Sullivan/Getty Images)