Also, Just wondering if anyone else has dealt with and knows why this happens. Copper has a tremble in his left leg. It spasms and at first I thought nothing of it and now it seems to be happening more and more and at different times. Sometimes it happens when he is nervous, or upset, or scared, or just sitting there. I immediately thought it was from fear or nervousness but when he sits up or is sitting there watching me or just looking around and it starts, it makes me wonder. HMMM.....