Trail Drive - Colorado Cowboys, Set II Author:Dave Sargent, Pat Sargent, Jane Lenoir (Illustrator) When Sam Aldred and a few of his cowhands discover a heifer in their herd of five hundred steers, they are shocked. And the heifer is ready to have her first baby. It's a girl! Five hundred boys and two girls just doesn't seem right. Sam and the cowboys who know try to keep it a secret from the others.