Originally Posted by
outrag
As I wrote on this thread back in June, Tanner had an infection (although not immediately diagnosed correctly) in his paw from a deck nail/splinter. The big difference with him and your dog is that he never got better, only progressively worse limping.
The other thought I had was a neck/spine injury that waxes and wanes. My dog Yukon injured his C spine and was in rough shape for a while (months) but improved. Unfortunately it's always a threat with him and although it was his neck/spine, he would walk gingerly and limp off an on on his left front leg.
Continued good thoughts for you.