Bent Tails.

Bent Tails.
Abnormal ram semen. Frequent bent tails are due to temperature shock. Magnification 160 X. For a ram to be classified as excellent, motility should be 71 to 100%; for satisfactory 31 to 70%; for questionable 11 to 30%; for unsatisfactory 0 to 10%.

Drost M (1968)