I'm Dr. Jo and I'm here to discuss your question about Kyra.
I'm so sorry she's been doing so poorly, but glad you are looking for the information you need.
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That way we can chat back and forth until you're satisfied with the information I've provide.
First of all, it sounds as if you are taking absolutely wonderful care of Kyra. Good for you! Even though it is traumatizing for you and her both to have gone to the ER and the vet school, that's what's necessary to make sure she's receiving the best of care.
We tend to call what Kyra is going through FUO. That stands for Fever of Unknown Origin.
I'd like you to know you are not alone in going through this. It's fairly common in cats, moreso in cats who go outdoors.
And any time a cat has a fever, they tend to be very inactive and don't want to eat much.
I am inclined to agree with the vets who've seen Kyra. Most of the time when we have symptoms like this in a cat Kyra's age with normal blood work and no apparent cause for the fever, it is a virus.
As is the case with all viral infections, we simply have to wait for them to run their course.
Supportive nursing care is sometimes necessary, and Kyra has received the benefit of some of this: namely, fluids and nutritional support. Sometimes force feeding is necessary.
I hope you can find some comfort in knowing that her blood tests help to rule out a lot of very serious possibilities. It's actually really good news they didn't show anything. I know it can be frustrating not knowing and feeling helpless, however.
Antibiotics, of course, do not help treat viral infections, but are sometimes used to prevent or treat opportunistic bacterial infections that take advantage of a cat who's down with a virus.
The most important things to do for Kyra at this point in time while waiting for the virus to run its course are as follows:
-Be sure she eats at least a little bit every day. This is an okay time to offer warmed food, canned food, even meat varieties of baby food - anything to get her to eat at least a little every day. Your vet has canned maximum calorie foods that are soft enough to be fed through a syringe, if necessary.
-Keep water fresh and close at hand for her.
-Stay in touch with your vet.
If she is getting dehydrated (skin gets doughy and is slow to snap back into place after you pinch/roll it up), she'll need to go back to the hospital for more fluids.