Murphy, our "Heinz 97" - looks like a flat coated retriever with dachshund undercarriage- was judged by the vet to be overweight - advice was to halve the amount of dog food and make his feed up with haricots verts (here we buy them in 4kg tins). Since then Murphy has become a significant contributor to global warming - and fortunately our fires are all woodburners so his methane cannot be ignited by the fire - hopefully