After taking the pup for a check up, he found out he has severe hip dysplasia, and will unlikely be able to walk by the time he is one-year-old.
He then set up a GoFundMe page to raise money for the surgery, asking followers to donate to save the dog instead of giving him a present for his birthday, which lands on Friday.
He claimed the only other option was to put the dog down, which he was "extremely against".
Within 22 hours he had raised more than US$8,500, thanks largely to three separate donations totaling US$6,000 from "Jayden Smith:.
Justin meanwhile has not yet contributed any money to save his former pet of six months.
However Salvador insisted Bieber was not aware of the dog's condition, claiming he didn't want to bother the Sorry hitmaker because the dog wasn't his responsibility anymore.
Todd isn't the first pet Justin has dumped: in he handed his pet hamster PAC to a fan just after a Christmas concert in Georgia.
The following year a monkey that he'd been gifted was left behind in Germany after it was confiscated by customs officials after the popstar failed to produce the required papers.
The following year a monkey that he'd been gifted was left behind in Germany after it was confiscated by customs officials after the popstar failed to produce the required papers. Photo / Instagram