Chipmunks

Because he is more of a lover than a fighter, Wrigley is not your ordinary, garden variety Labrador.

I always thought that Lab's were known for their killer hunting instincts; proudly bringing half nibbled critters (bunnies, birds and rodents) home to their parents..

Source: http://triblocal.com/glen-ellyn/community/stories/2011/06/more-is-more-mom-wrigley-the-champion-chipmunk-chaser/