It is normal for the gold-coated Chihuahua's hind legs to be thin, because the Chihuahua itself is very small, its frame will be smaller, and its limbs will be very thin. As long as there are no abnormalities in the dog's walking, there will be no problem. If you raise a Chihuahua, you need to be careful not to let it jump from high places, otherwise it will easily break. You can usually feed it some calcium tablets or liquid calcium to make the bones stronger.