Richard Horne said his father, Ferg Horne (64), was checking stock on his 16ha sheep and beef farmlet in Riccarton Rd on Saturday morning.
A flock of sheep, which had found some higher ground in the flooded paddock, had some "weird black" objects on them.
"He thought that’s a bit strange but he got closer and there were three rabbits sitting on the back of the sheep ... he was surprised and thought it was hilarious."
His father had been farming for nearly 40 years and had never seen anything like it, he said.