The objective of a breeding soundness examination (BSE) of rams is to evaluate and classify their potential breeding ability. This process should include evaluation of their physical condition as well as an evaluation of the semen itself. A BSE does not include an evaluation of sex drive or breeding behavior because there are no standardized criteria by which to judge these. Their best evaluation at present will come from observation of the rams breeding behavior after introduction into the ewe flock.
Bagley, Clell, "Breeding Soundness Examination of Rams" (1997). All Current Publications. Paper 427.