The Nebraska Humane Society says another dog has been poisoned in the backyard of an Omaha couple.

The group says 3-year-old Murphy became violently ill only minutes after being let into the backyard on April 4. He survived. A urine test later came back positive for strychnine.

Murphy belongs to the girlfriend of Paul Wagner, who lives with his parents in north Omaha. Two dogs belonging to his parents died in November after eating tainted meat in the same backyard. The meat was laced with strychnine.

The Nebraska Humane Society is offering $2,500 for information leading to the arrest of the person or people responsible for the poisonings.