Jagger, formally known as Thendara Satisfaction, collapsed at home in Belgium after competing at U.K. dog show Crufts.

Police are investigating if a 3-year-old Irish setter was poisoned after he died following a dog show, the BBC reported.

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Thendara Satisfaction, nicknamed Jagger, competed Thursday at Crufts in Birmingham. He collapsed and died after returning home to Belgium on Friday.

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Breeder and co-owner of Jagger, Dee Milligan-Bott, said an autopsy had shown the dog ingested beef containing two kinds of poison. She warned other dog owners to be cautious.

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"This resulted in a very painful death for our beautiful boy," she said, adding the police had been notified.

The autopsy was done by a veterinarian, who also suggested the tainted beef had been eaten while Jagger was at the dog show, the Guardian reported.

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Milligan-Bott added she did not believe the poison came from another exhibitor at the show.

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She said she had spoken up about Jagger's death not to point fingers at others within the dog show.

"I've done this to raise awareness of the heinous crime that took place in the murdering of Jagger, and to make sure that we all don't become complacent and we ensure safety and security at all times," she wrote.

"So I ask all of you to unite in finding the perpetrator who did this," she wrote. "And let's continue to produce and breed our gorgeous dogs who we are all so proud of.

Toxicology tests were being run following the veterinarian autopsy, CNN reported.

The husband of Jagger's other owner said they were devastated, the BBC reported. As part of the investigation, police would be reviewing surveillance footage.

"I can only hope it wasn't an act of jealousy by another competitor, but just a lunatic," Willem Lauwers told the BBC.

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