Wouldn't Zora's eating fish be the same thing.
Gorons are rocks that have magma in their bodies because I have seen them with steam out of their very bodies.
in the real world, there are PLENTY of fish that eat other fish. we are mammals and we eat other mammals. you also seemed to miss the point.
rhinos have rock hard skin. why cant gorons just have similar skin to rhinos. i dont see why they would be made out of rocks. there is nothing in the games to hint to that.
I think they have rocks for skin, considering that they seem to have magma in their bodies since some of the elder pour steam out of themselves.
i have played every Zelda and dont recall any of the Gorons blowing magma out of their bodies. even if they did, it was probably just a comical thing, but i still dont recall this happening.