I can absolutely counter that vegan argument and prove to anyone with eyes to see and at least a bare modicum of intellect to understand, that the "immoral argument" is false. I can do this in a variety of ways, and in fact I shall do just that!
I'll start with the simplest argument which is simply self-preservation. A ship-wrecked man stuck on an island with very few, if any, fruit-bearing trees might nevertheless manage to supplement his diet by catching fish, finding small crabs and other crustaceans, as well as other sea-life like prawns, oysters, shellfish, etc. Yet if he was a vegan and tried to live on the odd coconut along with a big bowl of seaweed, he'd quickly—in a month maybe?—die of starvation. So in the case of simple survival it's okay to eat meat? Well ship-wrecked vegan do you lay down and die?
Maybe the well-fed vegan will argue that it's very rare to be ship-wrecked on a desert island. Well sure it is. Okay how about a real desert? Nomads wandering through the dunes might find precious few acres of wheat, corn, rice, soy bean, wheat grass, etc. They have their camels and their livestock, goats or something. That's how they survive. Do the desert nomads have a choice? They are—if you'll forgive my somewhat arid pun—in the same boat as the shipwrecked sailor.
An honest vegan would admit that there are, and historically have been throughout the age of mankind, many many times when the simple survival of the family, clan, tribe, or troupe, required the killing and eating of meat. Do you disagree? In truth, the most damning accusation that a vegan can factually say about the "immoral eating of meat," is that if there is a surfeit of alternative non-meat non-dairy options then perhaps—and only then—can it be considered "immoral."
Well it seems the vegan's case for immorality has been seriously weakened, but that's not all! The best argument for eating meat is that it's what makes this entire world work. Without eating meat we'd all be gone, every blade of grass, every tree, every tick and gazelle and ape and you! ... everything dead dead dead! I'll prove this fact with reductio ad absurdum.
Reductio ad absurdum (Latin: "reduction to absurdity"; pl.: reductiones ad absurdum), also known as argumentum ad absurdum (Latin: "argument to absurdity", pl.: argumenta ad absurdum), is a common form of argument which seeks to demonstrate that a statement is true by showing that a false, untenable, or absurd result follows from its denial, or in turn to demonstrate that a statement is false by showing that a false, untenable, or absurd result follows from its acceptance.So I'm God or Yahweh or Satan or Thor and now I'm going to create the perfect Vegan world. Not only are all the humans vegans, so is every animate life form from the tiniest bug to the biggest fish. They all live on plants, and in return the plants live on them. All are happy. It's the Garden of Eden y'all!
The two videos above are from the real world—where birds eat bugs, foxes, weasels, owls, and hawks eat mice. Imagine, if you can, my world? No predators to eat the locusts. No predators to eat the mice. No predators either to eat the goats, sheep, gazelles, and a hundred other plant eating herbivores. Do you know that they call it when too many plant eaters consume every plant there is? It's called a desert. There's nothing in a desert but skeletons under many feet of sand. It is the carnivores that keep the herbivore population under control so that they don't breed out of control until there is nothing left but extinction. The rational vegan imagining my silly world of "only vegans," must realize at this point that such a world could never work.
It is not just the lion's duty. It's not just the hawk's. All predators—including humans—must see to it that the plant-eaters are kept in manageable numbers so they don't kill us all.
So vegan, two things are true. 1.) If you must eat meat to survive then you should eat meat. 2.) Something, or someone's, gotta eat all that meat or we all die, vegan and carnivore alike.
Finally, as a last ditch argument, vegans will claim that eating meat and dairy is unhealthy. Yes of course! Why didn't we notice that 20,000 years ago? If only lions would start grazing, who knows, they might live to age seventy instead of only 10 to 14. If dairy is so unhealthy, just imagine how much better off babies would be without breast milk or formula! Instead of cramming that nipple in poor baby's little mouth, how about letting junior nosh on a nice clump of wheat grass!