A single breeding pair can produce about 500 mice in about 5 months under ideal conditions. In the wild, their average life span is only a few months. Baby field mice are blind, deaf and bald at birth but mature within about 3 weeks. Females are sexually mature at 4 to 6 weeks. Along with their natural habitat of the fields, they can be found in human habitation including homes and barns.
Fortunately, the Indians know that many fans enjoy entering the park several hours before first pitch, and are willing to accommodate. For a 7 p.m. game, for example, Progressive Field opens at 4:30 p.m., but be sure to line up at Gate C, as it's the only gate that opens this early.
Batting practice starts at Fenway around 3 hrs. before game time. You don't need a special ticket, but you do need your regular ticket. They will just let you in. In Major League Baseball each team will have about one hour of batting practice. Gates at Fenway Park open two hours before the first pitch. At that time the Red Sox, (Home Team) will have already been on the field practicing for about half an hour. After they finish then the visiting team practices for an hour, followed by pre-game activities, followed by the first pitch.