Yup. We have evolved to consume meat, as well has plant matter. You can argue this point down the rabbithole, but it's irrelevant to the broader point. If you want to say we're herbivores, fine. Lets not get lost in that debate.
> Fasting has been recommended in Eastern cultures for thousands of years. If they were bad, we would have known.
So has circumcision. I say that as someone not categorically opposed to it - but to say that just because something has been done a lot, doesn't mean it's not harmful.
> Processed food is unnatural....
Processed food is not harmful on account of being processed. It's can be harmful for what it contains. Most food is processed.
I assume you're talking about weird nasty foods. I don't have a proper label to define them by. Things with a ton of Hydrogenated Oils, or whatever is inside "Cheez Wiz"
> Try feeding your dog or cat the same crap and they get sick too.
For your very broad statement of processed food, this isn't true. I mean, dog food itself is processed. For food that the animal should not be eating, yes. That'll make them sick. Dogs can't eat all human food. Humans can't eat cow food. A dog will get sick if it eats chocolate. A human will get sick if they eat nothing but grass.
> What I meant is that they look lean and mean. Not one obese lion will you find in the wild.
That's caused by external factors, not because a wild antelope isn't "processed" or "unnatural". You can feed a lion antelope meat until it is obese. But it has evolved to be in a healthy balance when it exercises through hunting, and its intake is limited by the available prey.