Why does range of motion need to be measured separately for each joint? a. the average ranges of motion of joints are not known. b. each joint has a different range of motion. c. range of motion can change rapidly in a joint. d. none of the above

The answer is: Each joint has a different range of motion.

For example, observe the joints that connect your head with your body and the joint that connect your arm with your palm. The joint that connect your head and your body allow a 360 degree movement which is why you can spin your head around while the joint that connect your palm and your arm only allow 180 degree movement.

again, you should probably take him to the vet. goodluck