i dont think it is right to sacrifice an animal for your tastebuds, it makes no sense. some ppl say that we have the right to kill an animal b/c we are smarter than them, well does that make it okay to kill and eat the mentally challenged and babies? no, you dont see ppl going and eating thier pets, so why should any animal be an exception.
i truly dont believe there are any cons, ppl that get sick are often not aware about the protiens you need, and dont get enough of the right vegetarian foods. it doesnt mean that you cant get enough of the right vitamins being a vegetarian, it just means you have to try harder.
the pros are so many, look on youtube 30 reasons to become a vegetarian, i am for all of those reasons. that video really moved me, although i do not support peta because of all the adoptable animals they killed, they really do make some great points