Kidney Architecure/Size

Hello, these are some videos of my cat.  He is a 16 yo MN DSH.  He has been progressively vomiting more over the past 6 months to year.  His water consumption has also been increasing, especially over the last few months.  He is eating

Hello, these are some videos of my cat.  He is a 16 yo MN DSH.  He has been progressively vomiting more over the past 6 months to year.  His water consumption has also been increasing, especially over the last few months.  He is eating well, and maintaining his weight ok.  I obtained bloodwork last month, and his BUN was 51, and Creatinine 3.5.  Specific gravity 1.019.  Everything else is wnl.

He vomited about 5 or so times a few days ago, so I attempted a quick ultrasound.  I really did not want to stress him out…or give a sedative.  I did a very quick/minimal scan.  I was able to save some of his left kidney videos, and the architecture and size are concerning to me.  I was just trying to see if he might have a concurrent issue such as IBD….but didn’t really get to that point with a scan since he was nervous, and me too.

I’m debating adding a little prednisone to his every few days cerenia I am giving him.  Just seems like a lot of vomiting for a cat that is eating well….I feel I can’t blame it all on his azotemia.

I am just posting these left kidney views….I never quite got to the right kidney.

What do you all think about how his left kidney looks like?

Thanks