What is wrong with reducing the amount of food you feed your dog?
Try telling my aunt margaret that where fat mega is concerned. She thinks you are accusing her of not loving the dog because she feeds it too much but feels she doesn't love the dog as much if she doesn't feed her bits all the time causing her to get to her present diabolically obese condition.
She measures the amount of love by the amount of food she feeds the dog. Stupid, I know but you try reasoning with her. I doubt she's the only person out there like this.