
John Heard decided to paint the woolly beasts after thieves targeted his flock of 250 black faced ewes.
The farmer works on a remote part of moorland on Dartmoor in Devon.
"Sheep rustling has become a big problem with ewes worth around £140 each," the 48-year-old livestock farmer said.
"My flock roams Dartmoor and I was getting mighty fed up with losing so many."
The farmer got his inspiration after his son James told him about a Scottish farmer who had dyed his sheep before an agricultural show.
The harmless non-toxic dye eventually wears off with no side effects and seems to have put a stop to the thefts.
The National Farmers' Union said there had been a fivefold increase in sheep thefts this year, due to the high price of lamb.

