Which animal rights make sense?

In response to a legal decision, dismissing the claims of legal personhood as applied to Happy the elephant from the Bronx Zoo.

I always thought that legally, this was a bridge too far, but other countries do have more expansive views of animal personhood, and haven’t crumbled.

Are animal rights inherent? Are they good but subservient to human rights? Where does what is right begin and end? Does what is right change over time?