Prime Time Bliss is racing in western Canada at the age of 15 -- where it is still legal for him to do so. Of the following, what do you think should be the mandatory retirement age for Standardbred racehorses?

Prime Time Bliss is racing in western Canada at the age of 15 -- where it is still legal for him to do so. Of the following, what do you think should be the mandatory retirement age for Standardbred racehorses?

Choices