I have to agree 100% with your vet. He does need to be in the hospital on IV fluids. That’s the only way you can get that creatinine down and, even then, it’s not 100% guaranteed. Subq fluids are not going to do it. I know this from experience.
But what worries me even more is that high phosphorus. That can cause him to have mouth and tummy ulcers. That and the calcium multiplied together puts him at high risk for tissue calcification. The P has to come down. If he isn’t eating, that will make it come down to a certain degree but that’s not the situation we want (him not eating). Adding cooked egg whites to his food might help but often when the P gets this high, it’s tough to get them to eat the renal diets which are really, really low in P and what he needs. Anything you do get in him should have the correct amount of phosphorus binder in it (as prescribed by the vet). In my experience, aluminum hydroxide is the best one but, again, the vet needs to work with you on how much to put in his food. It only works by breaking down the P in the food so it’s not something you give him orally.
Truly....the best chance for him is to be in the hospital on IV fluids. While he’s there, I’d have them ultrasound his kidneys and see if he has any infection. Kidney infections can really cause the creatinine to jump but not the P level.
I’m so sorry, Helena.




