Many cats, especially those who have suffered joint injuries when younger, develop arthritis as they age.
In some cases, it causes only mild stiffness, in others, it causes debilitating pain.
If your cat no longer jumps or climbs as she once did or looks stiff or sore as she moves, talk to your veterinarian.
Great strides have been made in pain relief over the past few years, and your vet may suggest nutritional supplements or prescribe anti inflammatory or pain medications to reduce your pet's discomfort.
Your cat's muscle mass and tone may diminish with age as well, which may lead to a vicious cycle of declining health.
As movement becomes more difficult and painful, if your cat has arthritis, she will move less, lose more muscle, and reduce her movements even more.
Moderate exercise, on the other hand, is important to your cat's health even into advanced old age, and you can encourage her to keep moving in several ways.
If she has difficulty moving around, try placing some simple, secure ramps leading to her favorite chair or perch.
Play with her gently, tossing toys or crumpled paper for her to chase or swat.
Give her empty paper bags and boxes to explore.
If your cat is unable to exercise even that much, you can stimulate her circulation and help her joints and muscles stay supple by flexing and massaging them gently every day.
She will probably enjoy the attention and stimulation, if not, she will tell you.
If that is the case, just pet her gently, talks to her, and relish the time you still have with her.
Love, after all, is the best medicine.
Cats often tend to hide their illnesses, so if you suspect that your pet is sick, take her to the vet right away.