PETA Says: Iditarod is Dog Cruelty - More than 150 dogs have died running the race - The Humans might be Enthusiastic About Winning a Big Cash Prize BUT... What's In It For The Dogs? Also: 30 Racehorses Die at Santa Anita.

Are the Dogs Having Fun Running and Running and Running thru the Ice and Snow? Pointlessly? 

Alaska’s Iditarod dog-sled race is nothing short of a nightmarish ordeal for the dogs who are forced to run approximately 1,000 miles while pulling a heavy sled in some of the most grueling conditions on Earth. More than 150 dogs have died running the race—not counting those who suffered and died while chained up outside during the off-season or who were killed because they lacked the speed or stamina to make the grade. 

https://www.peta.org/action/tell-gci-stop-powering-iditarod/

https://www.peta.org/blog/2022-iditarod-to-mark-50-years-of-running-dogs-to-their-deaths/

The Iditarod Trail Sled Dog Race, is an annual long-distance sled dog race run in early March. It travels from Anchorage to Nome, entirely within the US state of Alaska. Mushers and a team of between 12 and 14 dogs, of which at least 5 must be on the towline at the finish line,^[1] cover the distance in 8–15 days or more. The Iditarod began in 1973 as an event to test the best sled dog mushers and teams but evolved into today's highly competitive race.
Teams often race through blizzards causing whiteout conditions, sub-zero temperatures and gale-force winds which can cause the wind chill to reach −100 °F (−73 °C).

There has been 30 Horse Deaths at the Santa Anita Racetrack. That's Insane! Are the Horses Having Fun? I've seen Wild Horses Running Free in the Meadows in Northern California and It Seems to Me That THOSE Horses Have a Better Life... Just Running for Fun and Eating Plants and Sex... A Complete Life...

https://www.peta.org/issues/animals-in-entertainment/animals-used-entertainment-factsheets/horseracing-industry-drugs-deception-death/

The Horseracing Industry: Drugs, Deception and Death...

Racehorses are the victims of a multibillion-dollar industry that is rife with drug abuse, injuries, and race fixing, and many horses’ careers end in slaughterhouses.

https://www.courier-journal.com/story/sports/columnists/c-l-brown/2023/06/05/churchill-downs-horse-deaths-2023-santa-anita-park-louisville/70196656007/

Santa Anita Park in California had a rash of 30 horse deaths from December 2018 to June 2019 that rocked the state's horse racing industry. The track's ratio of 3.01 fatalities per 1,000 starts in ‘19, according to Equine Injury Database compiled by The Jockey Club, was double the national average.

Headline: Alarming spate of racehorse deaths draws scrutiny of industry safety practices. 

https://www.pbs.org/newshour/show/alarming-spate-of-racehorse-deaths-draws-scrutiny-of-industry-safety-practices

According to a group that opposes horse racing as inhumane, 901 thoroughbreds died in 2022 — more than two a day. 

Headline: Churchill Downs to suspend racing after 12 horse deaths at racetrack.

https://www.foxnews.com/sports/churchill-downs-to-suspend-racing-amid-12-horse-deaths-at-racetrack