Have Cat Questions? Ask a Cat Vet Online.
Hello,Thank you for using Just Answer. My name is***** am a veterinarian and will do my best to help.
I am sorry to hear about Honey's problems. Please give me a moment to type my answer.
When an older cat loses weight, and is not eating well, it is usually due to some internal disease. What you describe: going to food and water but just standing there without eating or drinking, is classic for some of the diseases we see in older cats. This could be chronic kidney disease, pancreatitis, liver disease, heart disease, and (sadly) cancer. Any of these would make a cat lose weight, and not eat.
The sneezing could be a respiratory infection, but usually cats do not lose weight from a respiratory infection. Doxycycline would be the antibiotic of choice for a respiratory infection.
If you check his gums, are they pink or pale? Can you take his temperature with a thermometer?
The place I would start if he were my cat would be a thorough physical exam and possibly blood tests. Let me know what other questions I can answer.
You are welcome!
Kindly consider rating my answer so the website knows I assisted you. Please let me know how he is doing and what you find out.