No tests taken, just thru his examination,drs knowledge of this type of symptoms. Dog lays, seldom moves, drinks some water, eats ocassionally, about every other day is a day he will walk around, wag the tail eat and drink a little. He will soon be eleven years, old, no other problems, has been healthy all along. Very bad breath, teeth are fine. always been a finicky eater, no bones ever, dry dog food, canned meat or table scrap meat has been the diet.