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This is Dr. Cynthia. Thank you for contacting us. I will try to help with your concerns on here. The system will automatically offer an option for a phone call. It is just sent out automatically. I cannot do phone calls. If you'd like to continue with this chat please let me know when you are ready. If I do not hear back from you right away, I will check back periodically to follow up.
Great. Please give me just a minute to review what you have provided already. I’ll have a few more questions. While I’m doing that, I need to know if your cat is strictly indoors and whether there are other pets in the home. I seem to ask everyone those two questions.
When you say her blood work was normal, do you have a copy?
An aged cat that is not only eating well, but ravenously, and still losing weight would be hyperthyroid until all tests have been exhausted. A simple T4 is not sufficient. I assume they did a "free T4" also? Free not being what it cost, but the name of the test. A thyroid nodule would also be palpable.
After that, in order: diabetes, EPI (exocrine pancreatic insufficiency). intestinal malabsorption. The latter two should have diarrhea or other GI signs.
Uncooperative or not, she needs additional tests for the things I mentioned. Is (was) she a normal weight cat, or a little overweight to start?
Mobilizing fat for energy is also dangerous in cats. Another reason to identify a cause and get it corrected. The thyroid is truly a "master gland". Excess thyroid hormone stimulates all systems, including the nervous system. Many hyperthyroid cats will just wander through the home howling at nothing, or up all night pacing the house.
It would be unlikely to do a Free T4 on a routine panel. Ask for it to be done if it wasn't. Your vet can also give you 100 mg Gabapentin to be given one hour before her visit mixed in food. It will make her much easier to deal with at the vet.
It is less dangerous than wrestling with her at 16 years old.
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