Hey there I know I already said good luck, just saying it again!

Here is my question, as related to snakes.

If humans have evolved over time to live off of the nutrients of both plants and animals, and you cut one out and could still live healthily...

I wonder if you could do the same thing for snakes. Tofodents? lol. I don't know. I am just curious. I mean, humans are nothing more than just a complex animal. If we could forgo essential nutrients provided by eating meat, could another species do it as well? I assume supplements would have to be provided (do vegan's take supplements to provide the nutrients that eating meat would provide?). Just curious, that's all. Not saying I would do it.

Also, what is the difference between a vegan and a vegetarian? I was under the impression they were the same thing but I guess not?