Welcome to Justanswer. I am Dr. Loretta, a licensed veterinarian, and would like to assist you. I will respond quickly after reviewing your question.
Good Morning and welcome! I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
I am so sorry to hear about your sisters sweet Shaun, Lyn. If this is Feline INfectious Peritonitis (FIP), this is very serious and 95% of cats with this disease do not survive the wet form which is what you are describing for Shaun's illness, I am so sorry to say. The steroid treatment will help for a short period but all your sister can do now is to supplement Shaun with Pedialyte, a few cc's every 4 hrs to keep him hydrated and also give him some liquified canned food using a syringe to keep his nutrients up while his body is trying to heal.
Have your sister take Shaun to his vet Monday to be sure that there may not be other treatments for this poor guy but the prognosis is not good for her precious Shaun...he is being treated with everything possible so now it is important to make him comfortable, Lyn. Check out this LINK for more information.Does that make sense to you?
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That is probably the best for your sister's sweet Shaun. Your vet would not know how quick this would be since many cases are different but, Lyn, since he is not responding to the medication, the prognosis is not good, I am so so sorry to say!!
Teeth grinding indicates pain...sorry that I did not address this earlier but it is not a good sign. I know you are clutching at straws, Lyn, and I would also in your situation but now you know that Shaun is in pain. So sorry!
You are very welcome, Lyn...I know this is hard but it is best to do what is best for Shaun. I wish I could give you better news...
Thank you so much, Lyn, for your kind rating. It is very much appreciated! Even though you have rated, we can still communicate. If you have other questions, please Reply. I am always happy to help. I hope things will work out for your sister's precious Shaun!Have a wonderful day!