Hercules is my sister's little shelty. He is getting up in age and developed Rheumatoid Arthritis. The sad thing on this is his second favorite activity in his life was taking walks. His heart is still in it but his front little paws just can't go far any more.
BTW: His favorite activity in the world is taking rides in cars. Or just being in a car. It does not have to move, he just wants in it.