Reward money continues to pour in as animal rescuers increase their efforts to locate and arrest the person or people responsible for leaving a dog in a remote area of Malibu with its snout zip-tied shut.

The dog was found by a pair of rock climbers about 250 feet down the side of the road in Malibu Creek Canyon earlier this month.

The adult German shepherd, given the name Argon by his medical care providers, was discovered over the scorching Fourth of July weekend with a zip tie around its neck and another around its mouth.

The Los Angeles County Sheriff’s Department responded to the call and deputies met the climbers near the 500 block of North Malibu Canyon Road to help bring the dog to safety.

He was rescued and taken to a local animal shelter for treatment of myriad illnesses, including inflammation, warts and skin tags on his legs, stomach and groin. Officials suspected that he may have been exposed to poison oak during his time lost in the wild.

In addition to those more obvious surface level illnesses, it was also suspected that Argon was suffering from lymphoma — cancer of the lymphatic system.

Last week, the dog was taken in by German Shepherd Rescue of Orange County. On Wednesday, In Defense of Animals said the rescue organization had confirmed that diagnosis.

They also found double ear infections, swelling in his lower extremities and “trauma to his hind legs.”

“His ears are now healing, but his feet are still swollen two weeks after his ordeal,” a spokesperson for In Defense of Animals wrote.

Maria Dales, the founder and director of German Shepherd Rescue of Orange County, said Argon remains a “gentle soul” despite the abandonment and abuse he’s suffered.

“He seems to sense that we are all here to help him and his trust level is growing,” Dales said. “He doesn’t appear to be as introverted as he was when he arrived.”

The next steps in Argon’s care will be for him to see a veterinary oncologist to determine the severity of his cancer diagnosis and come up with a plan for treatment, Dales added.

In Defense of Animals was the first organization to announce a reward for information that leads to the arrest and conviction of the person who abandoned the dog in the sweltering heat with its mouth closed shut.

That reward tripled within days and has since increased to $25,000 thanks to multiple organizations and individuals chipping in cash in hopes of finding those responsible.

Fleur Dawes, communications director for In Defense of Animals, said they’ve been “overwhelmed” by the public support and said they hope the reward is enough motivation for someone to come forward.

“Someone knows this dog and the person who hurt him,” Dawes said in a news release. “We hope this huge reward offer encourages that person to step forward and share their tip with us so we can get justice for Argon.”

Argon’s case remains under investigation by the Sheriff’s Department and the Los Angeles County Department of Animal Care and Control. Anyone with information is urged to contact the LASD Malibu/Lost Hills station at 818-878-1808.

In Defense of Animals is also soliciting donations and collecting tips related to Argon’s case, which can be provided anonymously or directly by calling 415-879-6879.

“We are hoping that someone in the public will have the courage and compassion to get this cruel abuser off the streets,” Dales concluded.