Not just humans but also their pets put on weight if they eat too much and don’t get enough exercise. The consequences are similar and so is the dieting advice: lose weight slowly and sensibly. “There are multiple studies confirming that almost half of cats and dogs are overweight,” says Petra Kölle, senior physician at a small animal clinic run by the Ludwig-Maximilians-University in Munich. The pet version of the Body Mass Index (BMI), the Body Condition Score (BCS) is a common method for assessing an animal’s body. Ideally, cats and dogs should have a clearly visible waist and upwardly slan…