Dog owners can assess their dog's body condition at home using simple methods like the rib test. To perform this test, gently run your hands along your dog's sides. You should be able to feel the ribs without pressing hard, but they shouldn't be visible. If the ribs are difficult to feel or covered by a thick layer of fat, your dog may be overweight. Additionally, when viewed from above, your dog should have a noticeable waistline behind the ribs. If the waistline is absent or bulging, it's a sign of excess weight. Consult a vet for precise guidance.