This happened a while ago
my mother in laws neighbour has a haulage business and has a couple of fields out the back. Which have a few sheep and some chickens. His wife had seen charlie coming in and helping himself to some of the chickens in the afternoon. So he asked if I could help.
Luckily he had a loader and put a board on the tines so it was used as a makeshift high seat
So high seat in place and the waiting game started, watched a cracking sunset
It was not until last light when I saw the first one moving in the field, but there was no shot on due to it moving in and out of the sheep. By this time I was losing the light.
A few days later I was up there again and this time he had moved the sheep to another field and topped the nettles, waited for last light when I saw Charlie moving from right to left. He paused. Number one in the bag
Another couple of days latter up again , last light again and number 2 in the bag
Haven't had any problems since