About 5 years ago I gave up mammals. I don't eat anything but chicken and turkey, and let me tell you I'm really sick of chicken and turkey at this point. It was a compromise with myself because I do need protein and want to be able to order things in restaurants, but I don't want to help create a demand for cows or pigs.
you probably already know this but factory farmed chicken and turkey is treated just as inhumanely and raised in even more disgusting circumstances than beef or pork. this includes dairy cattle (factory farmed) but you can read.
if you need protein sources, wheat gluten is acceptable for human beings, as is soy. nuts are high in fat but you can include small amounts to supplement, and there are many ways to combine vegetables and create a complete protein. quinoa is one grain that stands alone.
vegetarianism/veganism is not anything to be approached haphazardly, because a person can make themselves ill and deficient in a lot of areas if they don't do a lot of the nutritional homework. (and if they don't want to and would rather eat mcribs and hot pockets instead, i don't care LOL. they don't tell me to eat steak and i don't tell them what to eat.) i only mention alternative protein sources because you are apparently interested. if you don't care, never mind.
37 yr. vegetarian, and i have lapses of veganism. or i should say i try to eat vegan as much as possible but sometimes i feel like eating ice cream or pizza. as far as i am concerned, tofutti is not an acceptable substitute for ben & jerry's and i have yet to find a soy cheese that is edible.
i don't think "cheating" on dairy cows a couple of times a year is the end of the world, but i wish i could say that i didn't do it. i don't really do it for moral, ethical or spiritual reasons so that is probably how i am able to live with myself. (<----sarcasm)
if i liked honey, i would have no problem eating it without feeling bad for the little bee slaves. nor will i stop using burt's bees lip balm because it's the best i've found in 20 years. just because it contains beeswax, it is not PETA approved.