You switch your overweight dog from her usual food to one whose label suggests the kibble will help her slim down, yet she doesn’t lose an ounce. Maybe she even gains weight on this new food. How can that be? It’s because calorie levels for weight management foods for dogs are “all over the place,” says board-certified veterinary nutritionist Deborah Linder, DVM, who heads the Tufts Obesity Clinic for Animals.

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