1769 I. i. 8 With relays of your nag-tailed bays.
1881 ‘J. Larwood’ vii. 145 Lord Rodney..was the first gentleman who ran nag-tailed horses in his carriage.
1901 F. Wilkinson Introd. 3 The Duke of Cumberland's Light Dragoons were mounted on active nag-tailed horses from 14½ to 15 hands high.