The only animal sources of food I eat are eggs, fish, and dairy because I gotta have my cheese and yogurt. LOL I have never felt better and more energetic. I will NEVER be a vegan as I think that can be unhealthy, but by not eating meats it has made me much, much more healthy and feeling great. My athletic performance has gone way up as well.
Here is just a little info on vegetarian protein eating as this is a concern for a lot of skeptics.
1. Vegetarian Protein Combinations: http://www.theveggietable.com/articles/protein.html
2. Hummus is a complete protein: http://nutrition.about.com/od/askyournutritionist/f/hummus.htm
4. Nuts & Seeds info: http://www.all-creatures.org/recipes/i-nuts.html