Last week on her walkies my mutt let out a yelp and immediately turned up lame on her right foot. After a complete visual check up she hopped slowly back home. No bee sting, glass, goat head thorns ... and for two days was completely off the rear foot. Gradually she's been using it more but still has trouble turning around on smooth flooring, she loses footing.
I'm afraid perhaps finally age (she's 12) and arthritis are catching up with her. Now she's on doggie ibuprofin, still enjoys her walks but right now we're taking them slower, shorter and easy.