London - Justin Bieber has abandoned his pet puppy Karma.
The 'Boyfriend' hitmaker left his American bulldog pup with a dog trainer back in February and hasn't returned for her.
Trainer Trevor Dvernichuk told The Sun newspaper: "This is like taking your kid to school and not picking it back up."
Trevor was originally asked to take care of the pup for a few weeks, so he could train her before Justin, 20, assumed responsibility for her once more.
But not only has the pop superstar failed to return to collect Karma, he hasn't even responded to calls from Trevor.
Justin got Karma around Christmas 2013, finding the puppy at Ruffin's Pet Centre in Stratford, Ontario.
At the time, Justin's dad Jeremy asked his legion of fans to help name his son's new pet.
He tweeted: "So we're gonna let one lucky #belieber name @justinbieber's new puppy.... Follow and find out how it can be you)."
Later, he revealed: "so we have got a name selected for the newest Bieber. Big thanks to @justinfredos the Belieber who chose it ".Karma" (sic)."
In December 2012, Justin randomly gave away his pet hamster, Pac, to a fan at a Jingle Ball concert.
Justin Bieber's father threw his dog off a balcony.
Meanwhile, Justin's dad, Jeremy Bieber, is said to have launched the American Bulldog, named Karma, off the second storey of a building in a fit of rage after it bit Justin's little brother Jaxon.
Dvernichuk told TMZ that the pup - who was brought to training by Justin after he adopted him a year ago - snapped at the youngster prompting his father to pick up the dog and throw it over the side of the property into a snow bank.
Jeremy then told him to take away the dog and not return it to the family until it had been fully trained.
The news follows reports that Justin and his father had abandoned the pup - which they adopted last Christmas - with Trevor in February and never returned.
He said: "This is like taking your kid to school and not picking it back up."
Trevor was originally asked to take care of the dog for a few weeks, so he could train her before Justin, 20, assumed responsibility for her once more.
Not only did the pop superstar fail to return to collect Karma, he hasn't even responded to Trevor's calls.
However, Jeremy denied abandoning Karma and insists Trevor stole the dog, while he claims he simply held on to the pup to protect it after witnessing the accident. - BANG Showbiz