From the NYS Gaming Commission:
Queen of Umaill “pulled up lame” Saturday while training at Aqueduct – sesamoid fracture, euthanized. The 2-year-old had been raced twice – dead-last both times, a combined 41 lengths back.
The following day at Belmont, Mighty Zealous “developed severe respiratory distress and was euthanized in its [not his, its] stall.” Apparently, he had been suffering from pleuropneumonia for the past three weeks. Mighty Zealous was eight and had been put to the whip 54 times, most recently at Aqueduct in January.
Dead horses every day – this is horseracing.