More problems with neighbour

Unfortunately we are still having problems with a close neighbour, he went round to the house of the choir a couple of days ago really angry and demanded money from them because he said that the choirs chickens had been at his cabbages. This is the same person who threw a stone at one of the chickens and broke its leg for the same reason. The choir have farmyard chickens and they need to roam to find food, but it doesn't appear has has made efforts to protect his garden which is the normal procedure.