Kim Kardashian's kitty meets untimely death

Dec 7, 2012 at 8:34 p.m. ET

Kim Kardashian's tiny kitten has died. The white ball of adorable fluff known as Mercy passed away recently while being cared for by a friend of the reality star.

Kim Kardashian, Mercy

Kim Kardashian is in mourning for a furry friend today. Word broke Friday that Mercy, the teacup Persian kitten she was often photographed carrying about, recently died.

E! News has confirmed Mercy's death, reporting the cause was a cancer-like virus often associated with breeding.

At the time of her passing, Mercy was living in her second home. Though Kim Kardashian's kitten dreams came true with her adoption back in September, the reality star reportedly discovered she was allergic to all of that adorable white fluff.

Making "the best of a difficult situation," according to an insider, Kim K decided to send Mercy across the country to a friend who was in mourning after losing her feline friend after a dozen years together.

While on a flight from Miami to L.A., Mercy was cared for by one of the Kardashians' assistants. All seemed well upon the arrival in the friend's home on Oct.16, though the feline's miniature size prevents routine shots being given during checkups a the vet.

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Shortly after Thanksgiving, Mercy's health took a turn for the worse.

Reportedly going from acting playful to being limp and not moving in a short period of time, the friend rushed Mercy to an animal hospital. There, she received the heartbreaking news that the beloved pet had a fatal virus in her stomach that acts like cancer.

E! reports that after learning that even aggressive treatment wouldn't help Mercy, they had the kitten euthanized.

"Kim is really upset," a source said. "She was upset about Mercy dying and upset that she was trying to do something nice... and then she fell into a situation where [the friend] had to grieve another kitty. Kim called the breeder and said they should be more responsible."

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Though she wasn't Mercy's owner at the time of her death, Kim Kardashian is still feeling sorrow of the end of the teacup kitty's life. In a blog post shared Friday evening, she wrote, "It is with deep sadness that I have to tell you all that my kitten, Mercy, has passed away. My heart is completely broken."

Noting that her kitten was only 4 months old when she died, Kim Kardashian added, "Mercy was a gentle and loving kitten and we are all going to miss her so much. Thanks to Sydney for making Mercy’s short life one filled with love. RIP Mercy Xo."

Image via WENN