Ella is 9 yrs and has hip day plasma she's been on 2 oral meds and was getting adequan shots but now one whole hind leg is much larger than the other have been to 2 vets who extract thick clear liquid that is not cancer cells they don't know where it started or what it is no masses in belly have had X-ray and ultrasound she is haing a lot of trouble getting up and walking winces in pain a lot