I understand how it feels to have an overweight dog. Previously Dong my 2yrs old pom was weighing 13.7Kg. I was new to barf feeding him and i just didn't know how much to give him but then i found this calculator http://www.raw4dogs.com/calculate.htm. Gradually he lost 3Kgs over 4mths. I feed him twice a day meat/veg. I had to be very strict. No treats/snacks in between meals, not even a piece of fruit. I know it sounds cruel.