I am thinking of becoming a vegetarian. Are you vegetarian?
Yes, I do not eat meat or the by-products of animal slaughter.
So are you a vegan? I'm not for sure what the difference is in veganism and vegetarianism.
Vegans don't use any animal products. 
Oh that would be more difficult. My dad has alph-gal and he has to avoid mammal products. They are hid in so many foods. 
Yes, I avoid most processed food or food that comes in a package. You never know what is in them.