Well Ian,I dont believe many of the population are at all interested in dog racing, but if some believe it is cruel thats their opinion and they are welcome to it.
Perhaps they should make the effort to come along to their local track, get to know some owners and trainers and get up close to the dogs, see how they love their racing and how well treated and healthy they are.
They might just change their opinions.

Yes I am opposed to the promotion of homosexuality as as safe and healthy lifestyle, when it patently is not so.
I am also opposed to criminalisation of homosexuals, execution, or stoning of homosexuals, or any other obscentity which you habitual cite.

And BTW, we DO restrict peoples "freedom and rights" on serious health issues.