Be sure to check between your kitten’s paw pad webbing to make certain there are no thorns, grass spurs, or other foreign objects lodged there. Also, check for any split or damaged nails, as these are common injuries in cats. If you do not find anything there, then please refer to these following possible causes for your kitten’s limping based on the history you provided:
Hip dysplasia
Medially luxating patella
Cranial cruciate ligament rupture
If you would like to consult with a veterinarian 24 hours a day, 7 days a week, please refer to our AskTheVet page