The owner of a prize-winning Irish Setter says the beloved dog was poisoned at the world’s largest dog show.

An autopsy revealed that 3-year-old Jagger was given cubes of beef, which were wrapped up with several types of poison. Jagger died 26 hours after returning to Belgium from the Crufts dog show, where Jagger placed second in his category.

The timing indicates that the dog was poisoned while on the bench at the show, but Jagger’s owners say they don’t believe he was specifically targeted.

Investigators are checking surveillance video to see if they can identify anyone feeding Jagger during that time frame.

Jagger’s co-owner Aleksandra Lauwers wrote on Facebook, “To person who has done it, hope you can sleep well knowing you have killed our love, family member and best friend to our son.”

Watch Trace Gallagher's report above. Read more below from the Associated Press:

The only time Jagger was unattended and could have been poisoned was when he was on the stand for public viewing, his owners said - but they refused to believe that another competitor could have done such a thing.

"We can't and we won't think that this was the act of another exhibitor. If we thought this, we couldn't go on, and the last 30 years would be a complete waste," Dee Milligan Bott said on her Facebook page. "So I ask all of you to unite in finding the perpetrator who did this."

But that still leaves the question: Who would kill a dog show contestant and why?

Jeremy Bott thinks it was a case of mistaken identity. He said he believes the poisoner is someone who bears a grudge against dogs in general or the Crufts show in particular, but not Jagger himself.

In an article published in "Dog World," Milligan Bott suggested the real target of the attack could have been another dog she owns, Thendara Pot Noodle. That dog won the "Best of Breed" title at Crufts, while Jagger finished second in a preliminary competition.

Police in Belgium and Britain are aware of the incident, but authorities said they have not been asked to investigate. The Kennel Club, which organizes Crufts, said it is awaiting a toxicology report on Jagger's stomach contents before deciding what action to take.

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