As a canine chiropractor, I am constantly checking hip range of motion.
Different breeds have different hip motion due to the fact that their lower back may be angled down more towards the ground, limiting the amount of movement they have in their hip.
Normal hip range should be smooth and pain free for your dog. They should allow you to slowly draw the hip back with little to no resistance.
Sometimes your dog will pull their leg forward. This is usually a protective mechanism to stop the hip from extending into a painful range.
If your dog has hip arthritis or you suspect that it does, you will notice that the hip range of motion will end early compared to the other side. This is due to the worn out cartilage, and decreased space within the joint itself.
The video below demonstrates how you can quickly check your dog’s hips at home.