Or place the animal on its side and strike the side of the rib cage firmly with the palm of your hand three or four times. (springcreekanimalhospital.com)
As you stand up, keep your arms in close and bring your elbows up to the bottom of your rib cage, thumbs to shoulders. (womenshealthandfitness.com.au)
You should also see a noticeable «waist» between the back of the rib cage and the hips when looking at your pet from above. (aspca.org)