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How long has this been going on for?
Gums are pink?
Any abdominal swelling? Vomiting?
Are you still there?
Thanks for extra information
I have to wonder about a uterine infection in any older intact female
With that in mind and her inappetance this is one case where I would recommend having her examined
They should x-ray her abdomen and check her blood and urine
Can you take her in?