... but I don't think it's that deep because these animals especially cocks were meant for consumption
No they weren't, humans aren't carnivores. Sure, they are omnivores, but you don't necessarily have to eat meat.
By the way, everybody, am I the only one, who thought, dicks fighting when they read the term 'cockfighting'? Like imagine, two dicks swinging wildly against each other and whoever blows loads up the first time, they lose the game.
I am late to mention this, although this thought crossed the first time I read the title.