to cut off, as wool from sheep's tails, or horns from a cattle; to lop or clip off
Angus-shire dodded cattle1845, The New Statistical Account of Scotland: Perth:
Messrs. Toogood and Son’s Bronze Championship Medal for best dodded sheep of any pure breed.1906, The Flock Book of Wensleydale Blue-faced Sheep, page 57:
Shunting discs (or "dods") are generously provided, and following modern practice, most of them permit a movement in any direction for which the road is set.1951 October, Norman Crump, “Signalling at Thorpe-le-Soken”, in Railway Magazine, page 649: