Tight back muscles are sometimes an indicator of imminent back pain. Other times, tightness is a chronic concern that can create worry and discomfort for a very long time-frame.
Mule deer range from 3 to 3-1/2 feet tall at the shoulder, 4-1/2 to 7 feet long and have a tail that is 5 to 8 inches long. They can weigh between 130-280 pounds. The female deer are smaller than the male.
Because the eyes of mule deer are located on the sides of their heads, they can see a 310 degree view around themselves. They have better nighttime vision than humans, but less accurate daytime and color vision.