Confinement of cows to drylot or pasture did not influence the number of mounts received per estrus. Footing surfaces in both drylot and pasture were conducive to mounting, and both areas were large enough to prevent crowding. Zebu cows penned and fed hay at night and allowed to graze during the day exhibited more mounts in a pen than when on pasture (Mattoni et al., 1988). Duration of estrus was 2 h longer in the drylot than on pasture, but the number of times a cow
was mounted was not influenced by drylot or pasture. Therefore, estrus should be efficiently detected on pasture
or in drylot.