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Hi Katie. My name is***** I'm sorry to hear about this situation with your little guy. What is his name? Has he still been eating and drinking? In a situation with chronic renal failure, it is a progressive disease. It is one that at some point will cause his quality of life to be where it shouldn't. Is that getting close? It may be unfortunately. These cases are ones where it depends on how far an owner wants to push things. Can the fluids under the skin be increased to once a day? That can improve hydration and keep him going longer. The biggest thing I feel is that he should be social, eating, drinking and comfortable. He need to be getting these out of life to be in a position where it is fair to him to keep going. The actual chronic renal failure isn't a painful thing, but more of a draining situation. I compare it to being like a battery. As the renal function decreases, they just get weaker and weaker. It again isn't a physical pain that is associated with this.
Sorry for my delay. That is good that he's still eating the food well and drinking well. The urination for that long of a time is due to the fluids he's getting and the fact that he can't conserve water with his kidney function. I would say that if he's still doing this well and being social, you're not putting him through too much to continue. The other cat may be less social as he's smelling on him new odors from the trips to the vet clinic. The SQ fluids actually is pretty benign of an event for these guys to have done. I wouldn't feel in his situation addressing the teeth is a good idea. He's got the kidney disease and that is the big issue.