French bulldogs Koji and Gustav were seized in Los Angeles after the employee walking them was shot and wounded Wednesday night, and the gunman escaped in a vehicle.

“My heart is sick and I am praying my family will be whole again with an act of kindness. I will pay $500,000 for their safe return,” wrote the “Poker Face” singer on Instagram.

She added: “Email [email protected] to contact us. Or, if you bought or found them unknowingly, the reward is the same.”

Lady Gaga’s dog walker Ryan Fischer was shot and hospitalised in the incident, which is being investigated by the Los Angeles Police Department’s robbery-homicide division.

“I continue to love you Ryan Fischer, you risked your life to fight for our family. You’re forever a hero,” wrote Lady Gaga, referring to the employee.

A third dog, Miss Asia, ran away during the incident before returning to the wounded Fischer, and was later recovered by law enforcement at the scene.

French bulldogs are a coveted and expensive pedigree breed that can sell for thousands of dollars. It was not clear if Lady Gaga’s pets were deliberately targeted.

The star is reportedly in Italy shooting her next movie.