GREELEY, Colo. (CBS4)- A Firestone man pleaded guilty to poisoning and killing his neighbor’s dogs.

Joseph Losinski pleaded guilty to one count of aggravated cruelty to animals and one count of intimidating a victim or witness.

Losinski, 73, faces up to seven and a half years in the Department of Corrections when he is sentenced on Dec. 12.

According to police and court records, Losinski laced meat with strychnine, a powerful poison, and fed the meat to his neighbor’s two dogs. The animals, a German shepherd named Kyera, and a chocolate lab named Dozer Boy, both died.

Later, Losinski sent an intimidating letter to a neighbor who was a witness in the case.