COEUR d’ALENE — At only 5 pounds, Maxwell the Yorkipoo is big in personality.

Everyone in his Harbor Island neighborhood loves visiting with him when he stops by to say hello. They love him so much they've chipped in on the $1,000 reward to bring him home after he went missing Dec. 7.

"They're like, 'We miss Max just as much,'" owner Heidi Poole said Wednesday. "He was the most social dog."

The jet-black Yorkipoo was last seen on Harbor Island, wearing his brown and white reindeer Christmas sweater. The Poole family has plastered signs everywhere, posted photos on social media, taken out ads in The Press, called every shelter and notified animal control that this beloved pooch is missing.

"I've exhausted my efforts," Poole said. "I don't know what else to do."

Max was adopted late last summer after Poole's boys, Mason, 8 and Walker, 11, begged for a dog. Max has been their buddy, running around the neighborhood and enjoying a fun life with his boys.

"We're all missing him," Poole said.

Max's disappearance has tugged on the heartstrings of community members. Poole said people have called her just to see if he's been found, and someone took out another ad that reads, "If you have Maxwell, please return him. It's not right to keep someone's else's dog. He is a part of someone's family."

"It's just the sweetest thing," Poole said. "People really do, they're hoping for the best."

Poole said they have their suspicions that he may have been stolen, but all the family cares about is having him back. They would love to have him home for Christmas.

The $1,000 will be awarded for his safe return, no questions asked.

Max was not wearing a collar. He is not microchipped.

Call 208-661-3716 if you have any information about Maxwell's whereabouts.