A terminally ill dog who captured the hearts of thousands of people after his owner set up a bucket list for his final days has died.

Emily Mochan's seven-year-old blue heeler Buddy was diagnosed with terminal cancer in January, with vets giving him only four to five weeks to live.

It inspired her to set up a bucket list of all the things she hoped he could experience and she documented it on Facebook to nearly 12,000 followers.

Ms Mochan appeared on 612 ABC Brisbane last month to talk about the list, which had already conquered several entries such as going for a run on the beach, sitting in a police car, going out on a boat, and visiting a spa.

But on Wednesday morning, Buddy passed away.

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"We managed to tick off all the things on the bucket list but one – the only thing was to help other animals," Ms Mochan told ABC News.

"I was waiting until he passed so I could pass all his toys and money we raised to the RSPCA.

"All his toys will go to shelter dogs ... even though he's not here with others he's still helping others.

"He'll finish his list as soon as that's done.

"I can't change what's happened and it's very sad, but I'm happy I can see some good come from it."

Buddy's Bucket List originally had 27 entries but quickly expanded to 50.

Before his passing, Buddy went on to knock off a few more entries - such as having his own photo shoot, going four-wheel driving, being published in a calendar for charity, and paw painting a canvas.

"The best one was the ball pit. You've never seen a happier dog," Ms Mochan said.

"He also had a limo ride. It picked him up from the dog park, took him for a pie at Yatala Pies, then to another dog park and then home."

After Buddy developed a limp on Tuesday, Ms Mochan was informed by the vet that he would lose the ability to walk within 48 hours.

"We made sure he had an amazing night," she said.

"We brought him home and cleared out a space so we could camp out on the floor with him with the air con as cold as possible - that's just how he likes it, playing mini games of ball and tug and just savouring all the cuddles, and happy memories before taking him in first thing yesterday.

"He went peacefully with no pain, surrounded by friends."

Since posting about Buddy's passing, followers from around the world begun to write their messages of love and support.

"Everyone's commending me for how much effort I put into my dog's last days. They said he was a very lucky dog, but I'm the lucky one because I had him in my life," Ms Mochan said.

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