Estrus-Related Odors in Cows: Time of Occurrence

摘要: One Catahoula Leopard Cowdog and three German Shepherd dogs, previously trained to detect odors characteristic of estrus in cows, were used experiments determine when estrus-related odor first appears, how long it persists, disappears relation time estrus. Samples swabs reproductive tract fluids taken from vaginas cycling cows on the day estrus, at diestrus (8 10 days after estrus), daily intervals before Estrous emerges slowly during 3 reaches a definite peak intensity within 1 thereafter.