A heartbreaking scene at a racetrack shows how sensitive greyhounds really are.

Horrific footage from a U.K. greyhound racetrack shows some of the dogs crashing into a gate that was not properly removed. The scene became even more wrenching when the other competing dogs stopped racing and turned around to check on their fallen comrades.

Taken on Monday at Coral Romford Greyhound Stadium in east London, the video shows at least three dogs crashing into the gate, and one, reportedly named Borwick Magic, being carried off the track while the dogs who had returned to help him watch.