Bulls are the most costly animals on a cow-calf operation and provide the majority of genetic improvement for the cow herd.  It is not uncommon for producers to rough bulls through the winter since they do not have the nutritional requirements that gestating cows do.  However, it is important that bulls are not forgotten as the breeding season approaches.  For producers with a limited 60 day breeding season it is critical that bulls are healthy and sound going into the breeding season.   The extremely cold winter may have damaged the testis of bulls if they did not