Any advice would be most welcome. Over the last week Tara (7yrs 9mnths) has started limping. This is usually after she has chased 'chukka' balls with the pack (3 labs & Pia), but also when she has been llying for a while. She show no reaction when I physically examine her leg, paws or joints. Her limp does not always materialise at these times so I am reluctant to take her to the vet just yet. Given her age I wonder whether it is time to introduce her to Glucosamine & condratin pills. Or any other suggestions?