The pilot reported that, during the landing roll on a grass strip runway, a deer ran across the runway. She "felt [the deer] was too close [to the airplane] to initiate a go-around "so she applied the brakes hard, and the airplane skidded right and ground looped.

The airplane sustained substantial damage to the left wing and horizontal stabilizer.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.