I recently noticed that my 6 year old appy/twh rescue pony's front left knee was clicking when she walked and when I pick it up to pick her feet. She has never gone lame in the 3 years I've ridden her, nad never had any serious problems with her legs/feet. No health problems at all acually. Is this something that I should be worried about? My joints click all the time and I'm only 14. When she does that it sounds like the joints on our 20 year old+ arthritis sufferer qh gelding, but she is only 6.