Based on the history you provided, your cat may have sustained a bone or muscle bruise. In cats that suffer from
a possible inflammatory condition of one or more joints at this age, the clinical consequences of even these types of minor injuries can be exaggerated.
Please always bear in mind that falls or traumas can also result in more serious injuries, such as ligament tears or fractures. Below is a link for a common injury in the rear limbs of cats who have recently sustained trauma for your information.:
With limping resulting from any significant trauma, a veterinary visit is advised. If you would like to consult with a veterinarian 24 hours a day, 7 days a week, please refer to our AskTheVet page