General Healthcare for Senior Cats
Cats' health needs do change as they enter their senior years (10 years of age or older). Old age is not a disease; if your senior cat has experienced subtle changes such as change in appetite, change in litterbox habits, change in activity level (see list of changes here: http://www.vet.cornell.edu/FHC/health_information/SeniorCats.cfm ), any one of these is reason for concern.
We recommend your senior cat have a check up semi-annually once they turn 10. Every 6 months, schedule an exam, blood work, and a urinalysis with your veterinarian. The goal is to catch medical issues BEFORE you note symptoms. You will often have a much better outcome when a medical issue is caught and treated in the early stages.
Many of the hyperthyroid cats we see have been hyperthyroid for months to years, but this condition could be caught in the early stages when a senior cat has biannual visits to the veterinarian.
Here's to a long, long healthy life for your furry friend!
Cornell Feline Health Center Brochure on Feline Hyperthyroidism: http://www.vet.cornell.edu/FHC/health_information/brochure_hyperthyroid.cfm
American Association of Feline Practioners Brochure on Feline Hyperthyroid Disease: http://www.catvets.com/cat-owners/disease-and-conditions/hyperthyroid-disease