As a poultry farmer who has cats, could you explain what the cats are doing as ours don't so much as look at chickens but do kill a lot of rats which is more often not quite useful.
I'm in Derbyshire and a friend just had a variation returned and they seem to have started putting the lawful shooting of deer on certificates even if you don't have a deer legal calibre. The biggest calibre he has is a .204 ruger.