Mackenzie holds a prestigious license that gives her the authority to enforce law and order in the Lake Wildwood community.Twice a day, the bearded collie constable chases away the local goose gangs who hang out at parks and beaches, leaving behind unwanted reminders of their presence.But, because of summertime, Mackenzie has to take precautions against the heat while on goose patrol. "Since dogs are susceptible to overheating, and Mackenize has so much hair, I sometimes use a cooling coat that regulates her body heat," said Mackenzie's owner, David Anderson. Mackenzie also competes in various obedience and agility events in which …