You better watch out, Justin Bieber. Karma is a b*tch.

The 20-year-old has reportedly abandoned his American bulldog puppy, Karma, and has left her in the hands of a dog trainer for nearly nine months! The trainer, Trevor Dvernichuk, has spoken to 'The Sun' about the incident.

"This is like taking your kid to school and not picking it back up," he said.

Not only has the 'Boyfriend' singer refused to respond to any of Dvernichuk's calls, he also hasn't paid a time for the dog's upkeep. "Karma is gonna bite you in your ass Biebers," he wrote on Facebook.

The trainer refers to the puppy as "the best behaved American bulldog i've ever had the honor to train," but is steadfast in his decision that "it's time for her to go."

Justin's dad, Jeremy asked Bieber fans to help name the puppy when they first got her.

"So we're gonna let one lucky #belieber name @justinbieber's new puppy.... Follow and find out how it can be you)," he wrote. He later updated the page sharing the name they ended up choosing the name Karma.

Now, 11 months later, Karma isn't exactly a part of the Bieber family anymore.

This isn't the first pet that Justin's lost interest in. He also had a hamster that he gave away to a fan and a Capuchin monkey that he failed to provide the proper vaccination and importation paperwork when he tried to bring him on tour in Munich. He later was able to pick up the monkey from German officials but missed the deadline to do so.