Went to veterinarian today.
I had a theory that catto's only problem were his fucked teeth causing a series of other issues, vet said no, its probably renal failure etc...

Still prescribed me the meds I needed for the teeth pain, inflammation and other things.

Catto was basically non-responsive and dehydrated. Ready to die.
Did my plans, he is now (later same day) climbing around, eating a ton of food by himself and back to almost normal awareness.