I am SO sorry for what you and your sweet boy went through. My heart broke just reading it. I know he could feel your love and knew you were doing everything to take good care of him. God bless you and your Cassius.
Early detection of Kidney Disease
IDEXX Test Detects Kidney Disease
Someone mentioned this test, but I don't remember who. However, I talked to a couple of vet and vet techs who say they recommend it any time you have kidney issues in the line, or an individual pet has "off" blood work. As my friend and tech said "SDMA isn't the whole picture, but it is a piece of the puzzle. Our hands are usually tied by finances but regular scanning blood work is a pets best friend"
If the SDMA is elevated, she said they know to start close kidney monitoring.