[Mark H]

If by m moral you mean that it reduces the amount of suffering in the world I think it is.
What would happen if every one stopped eating meat.
1 Farmer kills all his livestock. {this to me is the most humane}
2 Fix all the animals so they cant have offspring. Then what let them go? There wouldnt be enough crops left to harvest let alone feed the world. The animals are going to die an unplesant death at some point.Old age isn't pleasant in nature. The last year will most likly be a slow torture .
Sickness in nature often leads to a slow painfull death.
Accidents with cars would be bad for both humans and animals.Many animals when hit by a car do not die imediatly
but can suffer for long periods before tyey die.
3 Not keeping wild animal populations in check is the same as # 2

Mark