Dressed in a yellow K-9 uniform from the Pasco Police Department, the gray and white pitbull was sworn in and began his duties visiting companies to collect items to benefit a local dog rescue group.
"Eddie was welcome everywhere he went and showed nothing but love and care throughout the day," the department posted on its Facebook page.
Videos posted on social media showed that he was pulled out of a PetSmart to applaud customers, greeting the team of a local dentist and eating ice cream.
Eddie has an inoperable tumor and 6 to 12 months to live, said Mikey's Chance Canine Rescue, who took care of him in his final months. He was abandoned near Benton City in October and was found by an animal control officer, the Tri-City Herald reported.
The tumor was discovered during a visit to the vet. Authorities contacted the rescue group, who found Eddie as a foster parent who came up with the idea of making a complete list.
He has already checked some other items, including staying in a pet-friendly hotel with ice cream and breakfast in bed, a spa day, riding a convertible car, and having a painting party with "doggy friends".
He still needs to watch a baseball game, set up a kissing booth at a local adoption event, get dressed and go out for Valentine's Day dinner.
The adoptive father will assist Eddie in his palliative care.