Took her for a walk on Saturday morning and she was fine after that. Fine thereafter for most of the day....then at around 7pm after a short spell outside, she came back in with a pronounced limp left front paw. We checked for thorns etc - nothing obvious.
She is still limping today but not so severely. I will phone tomorrow for a vets appointment if it is not resolved by then.
In the interim, any thoughts regarding possible causes? Could it be athritis / rheumatism rather than an injury?
One more thing - when she came back in from outside she smelt smoky! My dh thinks I am a fantasist for questioning whether someone took a pot shot at her over our fence with a BB gun. Probably am being a bit over imaginative there....