The death of the favourite in yesterday's Hobart Cup horse race has prompted renewed calls from an animal advocacy group for an end to the sport.

The Chris Waller-trained Quick Strike was euthanased after the four-year-old gelding broke a cannon bone during the race.

Animals Tasmania spokesperson Chris Simcox said horses were pushed too far.

"People claim to love their horses but really, to push them to the limits and beyond as they do with horse racing ... that doesn't constitute love, it's all about greed as far as we're concerned," he said.

The death comes after Animals Tasmania protesters picketed the Hobart Cup.

Mr Simcox said the horse's death would only spur on the organisation's protesting efforts.

"We're going to take this message out there," he said.

"There's a lot of injuries that happen that don't get into the media, that people don't hear about.

"It emphasises the fact that horse racing isn't as glamorous as people make it out to be."

TasRacing CEO Dr Eliot Forbes said the horse was euthanased by a veterinarian.

"The track was inspected and no track issue was evident," he said.

"It was a sad, unfortunate incident that the industry is not immune from.

"TasRacing places the highest priority on the safety and welfare of animals and riders."