The 11-month-old mixed breed lives in Kaikorai Valley and is known by many to make appearances in homes, businesses, schools and even across pedestrian crossings throughout the suburb.
His owner Jen Smart got the opportunistic "half-ragdoll, half-unsure" from Oamaru earlier this year, and has consistently dealt with his adventurous lifestyle since.
"He dances to the beat of his own drum," Ms Smart said.
Billy loved being around people and the outdoors.
He is often seen by people around the valley, whether that be walking, taking a nap or stopping in to say hello.
"As soon as he started going outside, he would just be gone for days on end."
Earlier this year, he spent four days in another family’s home, she said.
He conveniently took the place of that family’s cat which had also gone missing and was of a similar breed.
The family had only noticed their pet had been replaced by Billy when he started cuddling with them — something their cat did not do, Ms Smart said.
"We were a little bit worried because he didn’t come home. He just disappears and the only time we would hear about where he was, was if someone posted [online]."
Ms Smart and her partner have pulled out all the stops to keep him inside and keep track of him.
However, he was already on his fourth collar and had figured out how to open the window from inside her home.
"He makes his own rules."
There was always a concern his friendly nature would get him into trouble one day.
She received about two calls a week about Billy, but once received seven calls in a day after he made his way into multiple businesses in Kaikorai Valley Rd.
"When it rained heaps, he was inside and it was school holidays. He was quite depressed and he would just sit around home."
Once the rain stopped, he travelled down the valley and visited the businesses.
Kaikorai Valley College is one of his main destinations and Ms Smart often received calls from the school.
Deputy principal Janette Potter said Billy would make himself comfortable at reception by sitting on keyboards, scavenging the school’s canteen for food, and even made his way into classrooms and on to pupils’ desks.
Pupils did not worry about him, even opting to play with him whenever the chance came about, Ms Potter said.
A social media post on Lost and Found Pets - Dunedin (NZ) spurred comments about the fearless feline and where he had been in the community.
People commented with stories of where they had seen him, with some even posting pictures of him in various buildings throughout Kaikorai Valley.
One commenter said Billy was the coolest cat, and they would adopt him in a heart beat.
