Why is it that in the US puppies are required to be at least 8 weeks to be sold, but women are only legally entitled 6 weeks of maternity leave?

Seems kind of messed up to me

Why is it that in the US puppies are required to be at least 8 weeks to be sold, but women are only legally entitled 6 weeks of maternity leave?
Why is it that in the US puppies are required to be at least 8 weeks to be sold, but women are only legally entitled 6 weeks of maternity leave?
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