Iowa authorities are investigating another shooting death of a captive zebra, the fourth such incident reported by the animal's owner.

The Des Moines Register reports that the Buchanan County Sheriff's Office received a report on Dec. 9 of the shooting at Hevans Safari, southeast of Oelwein.

Hevans Safari owner Mike Henninger says the zebra was the fourth to be shot and killed at his property, along with a horse, since April 2017. Henninger was shot in the right leg in late October when he was behind his home.

Henninger says he started with seven zebras in 2017 and alleges he has received threatening texts, photos and videos from a neighbor, including images of the neighbor shooting a stuffed zebra and grilling meat. The neighbor has denied killing any zebras.