Welcome to Just Answer!
I'm sorry you have had such a long wait to get a response to your question. I just logged on and saw your question and have replied immediately.
I would like to help you and your senior cat with this question, but need a bit more information in order to better assist you.
If this has been helpful, please click on accept and leave feedback. If you need more information, just click on reply!
The above is given for information only. Although I am a licensed veterinarian, I cannot legally prescribe medicines or diagnose your pet's condition without performing a physical exam. If you have concerns about your pet I would strongly advise contacting your regular veterinarian.
Best wishes, Fiona