My Cav puppy developed MMM 3 weeks after her 2nd set of shots. Her blood serum was tested by a lab and MMM was confirmed. She is now on a special anti-rejection steroid. Although her condition was "Chronic" when diagnosed (jaw nearly completely locked), she has responded well to treatment. She can open her mouth wide enough to carry a golf ball around and although her face "hallowed" the muscles have filled back in. She's a little over 10 pounds now. DOB February 27th, ...