My Chihuahua Is Favoring One Hind Leg. We Have Examined It And There Seems To Be No Obvious Pain But She Is Favoring It. Could It Be Broken Or Dislocated Without Pain?

Your chihuahua could possibly have a pulled muscle, arthritis, or a fractured bone. It is hard to tell but you can give it 4 weeks and see if it gets better or worse. If it gets worse then you will probably need to bring him to the vet. the boxer showed no pain.