Cruz, a Samoyed, died days after competing at the Westminster Dog Show in 2013. Molly Comiskey, the veterinarian who treated him, told The New York Times that it appeared he had ingested rodent poison.
"Dogs are dogs. It's not anyone's fault," she said. "They eat stuff, they get into things, they make bad decisions."
Robert Chaffin, Cruz's handler, said he had watched the fluffy pup like a hawk in the days before the competition, even flying him commercial to New York. Chaffin told the Times that he believed extreme animal-rights activists could have been behind his dog's death.
"Unfortunately, dog shows have been plagued by some of these people for years," he said. "I've heard horror stories about other people's dogs having their setups tampered with, being poisoned, but I never thought it would come to me."
Ingried Newkirk, the president and founder of the People for the Ethical Treatment of Animals (PETA), denied that the organization had anything to do with Cruz's death.
"PETA does not sanction that," she told the Times. "It's so scurrilous, it's so low to even suggest it."