Hello.I was told tonight that my cat's creatinine level is 10. The vet recommends euthanasia asap as she said he is in pain and will not bounce back from that high of a level. He is lethargic, and drinking a lot and is obsessed with water sources (really more evident this past week, and the lethargy is only over the past few days), but he is still social and is always hungry (very normal for him). I am devastated. I don't know what to do. Please give me advice asap. Thank you.