The Dehumanising of Rights
No, No, and No again. Forget lovable Flipper for a moment, as soon as we link intelligence to having human rights we are slipping down the ugly route of eugenics where idiots, the insane and the Untermenschen no longer have rights and can be disposed of.
Humans have human rights because they are humans.
Wales and dolphins shouldn't be treated cruelly because it offends our notions of fairness and charity, not because they have our rights and obligations.