Boo: After several thousands of dollars worth of tests and diagnostics and treatment, we now know that he has congenitally deformed kidneys, which are now barely functioning. He will be on every-other-day subcutaneous fluids and twice weekly calcitriol for the rest of his life.
Boo is currently thriving. His weight is up, he is happy and healthy and extremely energetic. His chronic renal failure is not holding him back at all.
Shadow: After XRays and ultrasounds and bloodwork, we now know that his left kidney is full of stones and all shrivelled up and not working. Probably been that way for several years now. No biggie, since you get two kidneys. Well, usually. His good (and now only) kidney is all dilated, and the ureter leading to the bladder is all dilated, up until some sort of blockage. It is not a stone--maybe some sort of infective process or hematoma or a tumor or god knows what. He does have a stone in his bladder, which could have come through his ureter and scratched it up, leading to any of the above. We don't know.
Within the next week, Shadow will either build up enough urine pressure behind the blockage (a little urine is getting through, so it is not a *complete* blockage at this time) to force it through, into the bladder, or the antibiotics we are giving him will shrink it, or he will have surgery to rotoroot it out, or surgery will show that whatever is there is not mobile and therefore not fixable, and Shadow will die.
Two random kidney problems in two genetically unrelated cats. Both congenital sort of problems, both diagnosed within a 6 month period. Both in kidney failure (one hopefully just acutely). Both living in my house, both holding a piece of my heart. This is really, really not fair.