She said she decided to re-enter because of the amount of recent dog attacks and wanted people to realise dogs were not always out to attack people.
"It's great people can see what dogs can do in a good light," she said.
Miss Marriner, who got her first dog when she was 2, said she started teaching her dogs tricks about five or six years ago.
"I love working with dogs because they are always attentive and keen to learn something new. They are constantly energetic and wanting to have a good time."
She said she would next appear on the show midway through this month and encouraged others to give talent competitions a go.
"I have not yet thought ahead to what I would do if I won. I am just taking one day at a time," she said.
Another Rotorua New Zealand's Got Talent contestant, Kylee Waaka, 28, who was successful in his audition but has since been eliminated from the show, said he would now go for the wildcard position.
Mr Waaka said he had not originally wanted to audition for the show but was pleased he had because of the exposure it had given him.
"I was going to enter something in Australia, but I thought the opportunity was too good to miss. I knew I would be sitting on my couch thinking that could have been me.
"People have since asked me if I would perform at parties and community events which has really helped," he said.
He said although a lot of people would be trying for the wild card position it had not put him off.
"It's kind of like what Eminem said in his song Lose Yourself, you only get one shot," he said.
Mr Waaka said his supporters need to vote to improve his chance of being selected.
Rotorua's Rangimarie Bosma sang for the judges before being eliminated while JGeeks dance group, which includes members from Rotorua, have made it through to the next round.
Final auditions from Auckland, Wellington and Dunedin will air this Sunday at 7.30pm on TV1. Semi-finalists will also be announced on that episode.
