When a Nevada family was facing one of the hardest goodbyes imaginable, a compassionate stranger stepped up to give them a grateful moment they’ll never forget.

Marvin Gonzalez called the local Outback Steakhouse in Sparks on Jan. 6, to place a takeout order and give his two beloved Great Danes, Raven and Bruno, one last comfort before they were put down the following day, he told The Post.

Bruno, 11, was suffering from excruciating pain in the hips, while Raven, 3, had cancer.

The pooch had already lost one limb to the disease.

While phoning in his order, Gonzalez spoke to Julian Klein, a 20-year-old worker who was on host duties. During the call, Gonzalez couldn’t help but get emotional, and explained why he was placing the order for two Ribeye steaks and all the fixings.

Moved by the heart-breaking conversation, Klein quietly paid the $68 bill himself.

“Putting the dogs down was such a hard decision,” said Gonzalez, a 38-year-old married father of five.

“They were like my own kids. The ordeal was so tough on my family, and without even knowing us, this kid stepped up, way above and beyond the call of duty.

“I work in the Nevada Department of Corrections. I see the worst in mankind every day, so seeing the best was something I will never forget.”

Restaurant manager Brandon Nguyen told The Post that after listening to Gonzalez’s tragic tale, Klein was moved to tears and decided to do what he could to ease their pain and suffering.

“That’s the kind of guy he is,” Nguyen said. “He told me, ‘I would like to pay the bill for the gentleman. He’s already going through enough.'”

When Gonzalez arrived to pick up the order, he learned the meal had been paid for in full. Klein had used his employee comp for half of the $68.98 bill and quietly covered the remaining half with his own credit card.

“I was stunned,” said Gonzalez. “This level of compassion is rare. I don’t think he understood how much of a difference he made. He didn’t know us. He didn’t have to do that.”

That simple act of kindness didn’t change the outcome — but it softened the goodbye.

After the two dogs were put down, Gonzalez wrote a heartfelt letter to Nguyen to let him know how grateful he was for Klein’s efforts.

“In the professional world, we often talk about ‘customer service,’ but this was a rare act of pure human empathy,” he wrote. “To that employee: your selflessness provided a glimmer of hope on our darkest day. … You are the heartbeat of a great business.”

The letter eventually made its way to Outback’s corporate headquarters, where the big bosses also got emotional, said Gonzalez. The company reimbursed Klein for his kindness and sent the Gonzalez family gift cards they could use in happier times.