Shannon had to go in for an ultrasound today. All her tests have been coming back normal except for extremely dilute urine. So the vet wanted to see what things looked like inside. She didn't mention it to me, but I knew that the possibility of some sort of tumor existed.
So I spent the whole morning without my puppers trying not to worry too much, scared what I was going to hear. The vet called at about 1pm - the ultrasound was fine!! No tumors, none of her organs are enlarged as they would be if they were diseased. I'm ecstatic.
The caveat is that something is causing the problem. So she is going in on Thursday for the whole day for one final test - a water deprivation test. If the urine is still dilute then it is physical - likely is diabetes insipidus. If it concentrates it means it is psychological - she is obsessively drinking too much water. The first is treatable. The second will be more difficult. Perhaps I will have to contact one of those doggie psychologists.