I was looking after 800 tack lambs one winter and I was paying for the keep, the owner was going to pay monthly but never did (turned out that he never paid keep every year). When the lorries came to pick them up I left the value of what he owed me in the field. He rang to ask what had happen to the missing sheep and I said you can have them when you bring the cash round, he never turned so the sheep where mine.