The ones destroyed for injuring a hock? There's a freezer at the race tracks for the cadavers. The lucky ones deposited at rescues to be rehomed? It's a harsh reality that not everyone will love and nurture their racing hound from cradle to natural grave. It's not "nonsense". http://www.gbgb.org.uk/Injury%20and%20Retirement%20Data.aspx
Don’t forget killing the slow, injured dogs.
Is that how it goes? Dog race... Burger... Drink.
I had an uncle who raced dogs, they usually beat him though.