Explanation: I've really no clue, but I found this here, which may help other would-be answerers:
A "gomer" bull (also called a "spotter" bull) is an intact male that has undergone a penile deviation, penile removal, or vasectomy to render him incapable of physically breeding cows. You can use any breed of bull for this job; however, do not use large, heavy bulls because they can injure young heifers or small cows when they mount them. Many producers use a Jersey bull because of its small size. Be aware that any breed of bull, particularly dairy bulls, can become aggressive and need to be handled with caution. Gomer bulls do make good heat detection aids because they are naturally adept at identifying cows in heat. http://msucares.com/pubs/publications/p2209.htm
Explanation: I've really no clue, but I found this here, which may help other would-be answerers:
A "gomer" bull (also called a "spotter" bull) is an intact male that has undergone a penile deviation, penile removal, or vasectomy to render him incapable of physically breeding cows. You can use any breed of bull for this job; however, do not use large, heavy bulls because they can injure young heifers or small cows when they mount them. Many producers use a Jersey bull because of its small size. Be aware that any breed of bull, particularly dairy bulls, can become aggressive and need to be handled with caution. Gomer bulls do make good heat detection aids because they are naturally adept at identifying cows in heat. http://msucares.com/pubs/publications/p2209.htm
Explanation: [PDF] Literaturübersicht 7 2 Literaturübersicht 2.1 ...
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in den ersten drei bis sechs Wochen der Laktation befindet sich Die Kuh in einer
negativen ... Dazu zählen androgenisierte weibliche Tiere sowie **Suchbullen**, ...
The Cattle Pages -- The Internet Guide to the Cattle Industry
Our friends who have a large ranch have a **"gomer" bull** who has had a vasectomy.
He can't impregnate a cow, but doesn't know that, so he goes about his ... www.cattlepages.com/faqs/question.asp?id=2 -
Ich bin mir ziemlich sicher, dass es sich hier um einen sog. Suchbullen handelt, dessen Aufgabe es ist, brünstige Kühe aus der Herde herauszufinden, die er aber nicht befruchten kann, da an ihm eine Vasektomie vorgenommen wurde. Der Grund, warum man nicht gleich einen Zuchtbullen einsetzt, liegt wohl daran, dass man 'strategisch' befruchten will; also nicht jede Kuh soll mit irgendeinem Bullen Kälber haben, sondern die Befruchtung soll 'gezielt' mit einem 'vorbestimmten Bullen' erfolgen.
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