Maybe you should have watched her last 5 starts and seen her getting progressively worse. No shot I would have singled her in that field at those odds
This discussion goes way further than this horse in this race. But gamblers and horsepoeple and horses have to have confidence that the system in place to uphold safety and fairness is viable.
If the horsepeople want to push the envelope and race lame horses or the vets are incapable of determining lameness or scared of being sued, at the very least tracks should not offer pick X wagers.