a sheepdog or cattle dog trained to drive animals by running or nipping at their heels

my dog is a heeler and so doesn't require much grooming

a person who uses a rope to catch a steer by its heels (as opposed to its head), especially in a team-roping rodeo event

when the steer runs through the loop, the heeler must quickly pull the slack out of his rope

a cattle dog with a dark speckled body

a person who assists in a political campaign by canvassing votes for a party and performing menial tasks for its leaders