"My life just could not get any worst (sic) right now," she wrote. "I come home to find my dog woody is dead."
Osbourne was spending a few nights in Las Vegas following her split from Worrall, in an effort to move on from the failed relationship and celebrate a pal's birthday. "She seemed really happy and not phased by the breakup," a source, who saw the star out in Sin City, told PEOPLE. But the sudden loss of her pup was presumably not easy to handle.
The former Dancing with the Stars contestant got Woody in early June, when she flew to West Virginia to purchase a new pooch for her dad Ozzy, who lost his dog to a coyote last year. She has another Pomeranian, Sid, received as a birthday gift from her parents last October.