heeler

Short definition from Wiktionary

Noun

1. 1
   A gamecock that strikes well with its heels or spurs.
2. 2
   A quick runner.
3. 3
   A dog that readily comes to heel.
4. 4
   A dog used for cattle droving.
5. 5
   A dependent and subservient hanger-on of a political patron.
6. 6
   The rodeo performer who ropes the steer by its hind feet after the header has turned it.
7. 7
   A student journalist at Yale University.