More young race horses have been put down at race tracks in the U.S.
436 deaths nationally, with Los Alamitos, Golden Gate Fields, & Santa Anita reporting 84 total so far.
Injured young horses under age six whose muscular & bone structure are not completely developed are being put down. 
Appears that the California legislature, California Horse Racing Boards, the Vets & the owners are ok with this death rate.
Public demonstrations do not seem to rouse outrage or concern by the general public.