Around 1:30 p.m. on Friday, a man fell to the ground and went limp in a Perfect Pets outside Denver. He appeared to be experiencing a seizure.

Dogs in the pet store began to bark and jump up to the edges of their pens, alerting danger, as several employees rushed over to the man.

But in the background, another man who briefly hovered near the staff members briskly walked away to another part of the store. On security video, he is seen opening up a kennel and snatching two English bulldog puppies worth about $4,300 each, according to Bianca Rose Larsen, the store manager.

“Hey, what are you doing?” a staff member at the store, in Centennial, Colo., can be heard saying on the surveillance footage. “Stop! Stop! Stop!”

The thief collided with one of the employees trying to stop him and kicked her in the face. The puppies went flying, and the man just barely retrieved them before stomping out the door. Then, along with another man, he got into a gold Cadillac Escalade with chrome hubcaps, tinted windows and no license plates and sped off.

There was at least a partly happy ending: On Monday evening, one of the 11-week-old English bulldogs was safely returned. But three suspects are still on the loose, and one of the puppies remains missing.