We had this problem with a neighbour whose resppnse was a shrug of the shoulders, until I pointd out that the loss of one pregnant ewe, on the basis that she would produce mixed twins for eight years, some of the rams would be suitable for breeding and the ewe lambs would themselves be producing twin lambs after two years, and their lambs producing lambs after another two years, and so on the loss of that ewe would work out at about £16.5K. using just the Society upset auction prices and that's what I woulod be asking for as compensation if I found one of his dogs in my field again, plus a premium as I run a pedigree closed flock and so each animal is irreplaceable. Didn't happen though. His dogs were always on a lead and walked down another lane after that.