Heartbroken dog owners died while under the care of 53-year-old trainer Kwong (Tony) Chun Sit at Happy K9 Academy in Irvine, authorities said. This tragic incident highlights the lack of regulatory oversight in California’s dog training sector, as the state does not require trainers to have a license or specific credentials for general pet training. The only exception is for guide dog instructors for the blind, who must be licensed through the Department of Consumer Affairs’ Board of Guide Dogs for the Blind.

The deaths have prompted a police investigation and criminal charges against Sit and his 23-year-old girlfriend, Tingfeng Liu; both are facing multiple felony counts. Autopsies conducted after the dogs were recovered by Irvine Police showed that some animals died of heatstroke and at least one died from blunt force trauma. Nationally, issues of animal neglect or abuse in dog training facilities are significant but often under‑quantified, and precise nationwide figures on abused or neglected dogs are not well established.

Dog owners began to learn of the losses in mid‑June. Mariz Arcangel said she received a message on June 18 telling her a dog that was scheduled for pickup had been cremated. “On the day we were supposed to pick him up, June 18th, I got a text message from Tony Sit, who was the trainer—that he’s been lovingly cremated,” Arcangel said.

Irvine Police recovered the bodies and opened an investigation at Happy K9 Academy, the dog training facility where the animals were kept. Officials have said autopsies established heatstroke as the cause of death for several dogs and identified blunt force trauma in at least one case. Dog owners are encouraged to take steps to ensure the safety of their pets, such as thoroughly researching and touring facilities to check for proper conditions, low dog-to-staff ratios, and trained staff knowledgeable about canine behavior.

Owners who learned of the deaths gathered outside court and spoke publicly about the losses. “We went public on Facebook with the story of not knowing what to do and finding out there were so many other victims that was definitely a shock,” said dog owner Yadira Adan. She added, “This is the hardest part, is them [kids] not understanding what happened, why it happened and losing a friend like that.” The emotional strain on families has been considerable, especially when explaining the losses to children and seeking justice.

The investigation has continued as authorities review the circumstances that led to the animals’ deaths. Investigators have recovered the dogs’ bodies and are urging other potential victims to come forward, saying they believe there may be additional animals affected.

Sit and Liu are being held on felony charges and are expected to appear in Orange County Superior Court, but a specific July 1, 2025 court date is not confirmed in current public reports. The Irvine Police remain the lead agency on the case and have been credited with recovering the animals that were later examined by the medical examiners.

The deaths and the owners’ public statements drew attention in local coverage, with dog owners describing grief and a search for answers as criminal proceedings move forward. Several owners described the emotional strain of explaining the losses to children and seeking legal recourse.

Authorities continue to investigate and ask anyone with information about animals left at Happy K9 Academy to contact Irvine Police. Victims and their families have sought justice through the courts as the legal process progresses. Dog Trainer Certifications and Licensing – Happy Dog Training as the legal process progresses.