Perhaps lyme disease can make him hike his leg. As can luxating patella (floating knee cap). Either way, he needs to be seen by a vet. I know the behavior, when they don't want to walk but have that antsy vibe. Something is not sitting right with him.
__________________  The T.U.B. Pack! Toto, Uni, & Bindi
RIP Lord Scrappington Montgomery McLimpybottom aka El Lenguo the Handicapped Ninja 10-12-12 
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