Dear Dr. John,

I have been assisting a senior citizen in her mid-nineties. Several years ago I gave her a cat that I am convinced helps keep her happy and feeling purposeful. The cat is now 13, but we have not had it seen in a few years and it is due for a scheduled checkup and rabies vaccine soon. Are any other vaccines needed? The cat is a neutered male that weighs about 13 pounds and eats quite a few small cans of food daily. I have a concern that the cat does not drink enough water, only drinking about an inch daily from his cat bowl. Is that enough? I need to keep this cat healthy since I know it helps keep my friend going too. K.M.

Dear K.M.,

What you have been doing is commendable and there is a lot of literature that speaks volumes to the positive effects of animals in the lives of senior citizens. I’m glad that you have scheduled a visit for the cat, not only for the legally required rabies vaccine but for a proper physical examination, something that should be done annually, especially as the cat ages. I would also suggest a vaccine for FVRCP every three years which may also be due now. I would let the veterinarian guide you on that.

As for the quantity of water that a cat should consume daily, it is dependent on many factors. This includes their weight and size, diet, and activity. There are several suggested amounts. Some say 1 ounce of water per pound and others say that a ten-pound cat should consume about a cup of water daily. One thing  people do not often realize is that there is water in the food as well. Even dry cat food has some moisture in it but cans of wet food definitely have water in them. One usually doesn’t worry if cats drink too little unless they are ill. Too much water consumption can indicate failing kidneys, diabetes, or other issues, especially in aging cats.

The veterinarian may do bloodwork to assess kidney function, but it sounds as if the cat is drinking the right amount. Hopefully, all will go well at the next veterinary visit and the cat will keep your friend company for years to come.

Dr. John de Jong is President of the World Veterinary Association. He owns and operates the Boston Mobile Veterinary Clinic and can be reached at 781-899-9994.