Molly was 14 lbs when i rescued her, but slowly gained weight after she was spayed. In 2 years she had put on almost 4lbs!!
She partially tore her cuciate ligament in august last year, and the vet said she needed to lose weight. After 6 months of hard work, she has lost all the extra weight.
I did it by cutting down on her kibble and mixing it with some veg and a bit of boiled chicken..that way, she still has a dish full of food, but a lot fewer calories.