Cats should be considered "senior" at 8 years old whether they're showing signs of aging or not. At this stage, it's important to step up the preventive veterinary care to be sure to catch any little problem before it becomes a major health crisis. This is especially important for cats who, unlike dogs, tend to hide signs of illness until they're very sick indeed.

Twice-yearly veterinary exams are recommended for older cats, and those health evaluations need to include diagnostic tests: typically a blood test and urinalysis, as well as a testing of thyroid function and a test for the presence of heartworms. While these tests do add to the cost of caring for a cat, they are the only way to catch and treat early such serious health problems as diabetes, hyperthyroidism and kidney failure. These tests also help formulate necessary changes in your cat's diet as he ages.

Depending on the findings, your veterinarian may recommend additional tests to correctly diagnose and treat additional disease.

Another essential part of caring for an aging cat is to be sure your pet's mouth isn't being ignored. Your cat's veterinary examination should include a dental exam, followed by dental cleaning or other procedures under anesthesia as required. At-home dental care that complements what your veterinarian provides Ñ ask your veterinarian for advice Ñ will help keep your cat's mouth free of disease and pain.

Early detection means early intervention. Don't neglect your senior cat's health needs when he needs you most.