Erin Marie Hallstrom, by and Through Her Guardians and Next Friends, Thomas J. Hallstrom, Marlene Hallstrom v. Kimberly Ammerman

WOLLMAN, Circuit Judge.

Erin Hallstrom appeals from the judgment entered on the jury’s verdict in her action to recover damages for injuries she suffered when she was kicked by a horse. We reverse and remand for new trial.

I

In early June 1992, Erin, then thirteen, her mother, Marlene Hallstrom, and her sister, Betsy, traveled from their home in Lincoln, Nebraska, to Winner, South Dakota, to visit Marlene Hallstrom’s mother.

On June 11, 1992, Erin, her mother, and Betsy went to see some horses owned by Kimberly Ammerman. Ammerman asked Erin and Betsy if they wanted to ride one of the horses.…