I'm really sorry to hear about your dog being sick.Â
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My first suggestion would be to get to the bottom of what is causing this sudden onset of kidney/liver disease. Â Is it something the dog is getting into? Â Have there been changes in food or surroundings or any major upsets in the household. Â Until you figure out the cause, you'll only be treating symptoms.
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We've had this situation happen twice.
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First dog was a rescue lab mix who had been abused. Â After we'd had her 7 years, she suddenly developed kidney disease. Â The cost of keeping her at the vet's to be on IV fluids combined w/ her terror of being away from us led me to ask our vet to teach me how to do sub-cutaneous fluids w/ her. Â It's not as quick a fix as IV, but I could do it at home, as needed; saving stress on the dog and our budget. Â Turns out, anytime we had a change in our household like DH returning home from a deployment this dog would go into kidney failure. Â Using the sub-cu I was able to get her through a cross-country move, and 2 deployments..... she lasted another 2 1/2 years, well beyond what the vet expected. Â And she never had to stay at the vet's during that time. Â But I did have a vet who was willing to work with our situation... that's an important thing, just like w/ human doctors. Â When we moved I "interviewed" several vets to find one that would work with our situation...
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With the other dog, I switched him to a lamb & rice dog food and within a week we had to put him down due to severe kidney failure! Â Needless to say, I'll never feed another animal that brand/type of food again. Â Don't know whether it was something wrong w/ the food, or just that particular dog's reaction, but it's not worth taking the risk KWIM?
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I hope you are able to get to the bottom of what's causing the issues and also either work w/ your current vet, or find one who will work w/ you. Â Do you know any other dog/pet owners you could ask for a recommendation?