Groucho would be sold from the Bronx Zoo to begin the Fort Worth Zoo's elephant breeding program in April 1986. Before his transfer, Groucho sired the only calf born at the Bronx Zoo with Patti, a male named Astor.
While in Texas, Groucho bred two different females to give birth to three calves. Babe gave birth to stillborn twin calves in June 1996. In December 1998, Rasha gave birth to the first live calf at the Fort Worth Zoo, a female named Bluebonnet.
After Groucho failed to continue to breed the Fort Worth Zoo received a second bull to restart a breeding program. Casey arrived in November 2005 from the Ringling Brothers and Barnum & Bailey Center for Elephant Conservation.
Casey quickly bred after introductions with the females. In January 2008, Babe went into labor. However, the oversize calf would not enter the birth canal, killing both the calf and the mother.