Unfortunately I don't have much good news. There is some... his kidney levels are within normal range! YEAH!
However, when they removed the catheter, he was not able to move urine (other than a few drops) on his own. It may be due to spasms and swelling from having had a catheter for so long.
They have reinserted the smallest catheter that they could. It will remain in place for 24 hours. Then he will be observed. Hopefully he will begin to flow on his own.
I miss my buddy.