1. Observe the waist of the dog. A healthy dog should have an obvious waist, and the part from the chest to the waist should gradually contract. If the dog's waist is not obvious or his abdomen is drooping, it may be overweight.
2. Judge the dog's posture by touching. A healthy dog should have a proper fat layer, but it can feel its ribs. If you can feel the existence of ribs, it means that its posture is healthy.
3. Calculate the dog's physical condition score (BCS). BCS is a scoring system from 0 to 9, where 0 stands for excessive emaciation and 9 stands for excessive obesity. A healthy dog should be between 4 and 5 years old.
4. Observe the state of the dog when walking and moving. A healthy dog should have enough physical strength and endurance to carry out daily activities happily. If the dog looks tired or tired when walking or running, it may be overweight.
If the dog is found to have abnormal body shape, corresponding measures should be taken, such as adjusting diet and increasing exercise, to help the dog regain a healthy weight and keep healthy and happy.