An Alabama man and his son killed each other in a dispute over a dog, authorities said.

Washington County Sheriff Richard Stringer told WALA-TV that Kelvin James Coker, 60, discovered his dog had been shot on Saturday. The man then drove to the home of his 32-year-old son, Kelvin Nicholas Coker, who claimed to have killed the animal.

The older man shot first, shooting his son in the leg, and the younger man returned fire with a shotgun, Stringer said. Both men died from their wounds.

The sheriff called the family “very dysfunctional.”