Signs of aging in cats, as outlined by the American Animal Hospital Association (AAHA) and the American Association of Feline Practitioners (AAFP), can include:

1. Changes in mobility and activity level: Older cats may become less active and have difficulty jumping or climbing.
2. Weight changes: Weight loss or gain can occur in aging cats due to changes in metabolism or underlying health issues.
3. Dental problems: Dental disease is common in senior cats and can lead to issues like bad breath, difficulty eating, or tooth loss.
4. Changes in appetite or thirst: Older cats may experience changes in their appetite or thirst levels, which could indicate underlying health concerns.
5. Vision and hearing changes: Aging cats may develop vision or hearing problems, such as reduced vision or deafness.
6. Coat and skin changes: Senior cats may experience changes in their coat, such as dryness, matting, or hair loss.
7. Behavioral changes: Older cats may exhibit changes in behavior, such as increased vocalization, confusion, or disorientation.
8. Kidney and urinary issues: Aging cats are prone to kidney disease and urinary issues, which may manifest as increased urination, difficulty urinating, or accidents outside the litter box.

It’s important for cat owners to monitor their pets closely for these signs of aging and to schedule regular veterinary check-ups to address any potential health concerns.