How do get a pack on the Big Al game

The question at the start of the level determines how large your pack has to be to be allowed to attack the sauropods. If you answer one, you will be allowed to attack the sauropods on your own, but you'll usually fail on your own. you need to wait for about four other allosauruses are around when a herd is migrating through and then an attack option will appear. You need to visit the migrating area at the north, four squares in from the east. then follow the hints to what square the herd are migrating through.