Definition of "prad"

Horse Stealers, they go together always the Day before, to look over the Grounds for a good Prad or Prads […]

1754, John Poulter, The Discoveries of John Poulter, alias Baxter‎, Sherborne, page 39

We had fixed our eye on a horse-dealer, and had some conversation with him about the purchase of a prad; but we could not agree, and parted, on account of a deeker, who was eyeing us closely, and I observed him speak to the jockey.

1821, David Haggart, The Life of David Haggart, written by himself while under sentence of death‎, London: W. and C. Tait, page 22

'Just send somebody out to relieve my mate, will you, young man?' said the officer; 'he's in the gig, a-minding the prad. […] '

1838, Boz [pseudonym; Charles Dickens], “chapter XXXI”, in Oliver Twist; or, The Parish Boy’s Progress. […], volumes (please specify |volume=I, II, or III), London: Richard Bentley, […]

"Not a bad sort of a prad that brown one," he remarked; "looks a little gone in the near fore-leg."

1893, Ernest Favenc, "Bunthorp's Decease" in Tales of the Austral Tropics, London: Osgood, MacIlvaine & Co., 1894

So smooth of face, so fine of eye, so much a beautiful part of his beautiful chestnut prad.

1938, Xavier Herbert, chapter XIII, in Capricornia‎, New York: D. Appleton-Century, published 1943, page 212