Dears,
Referring to eat meat, especially mammals and birds, I want to tell you two issues:
1. The word of God
2. My personal experience
The word of God, spoken by Jesus Himself to people in Romania, said that the God is very upset on people, since 7,000 years, because they start to eat other souls beings and their dead cry to Himself asking for revenge of their lost lives and inflict only problems,to the host person which ate that animal. AND THAT ALL THE DISEASES IN THE WORLD COME FROM MEAT.
Though fish are allowed (example of Jesus multiplying fish) and of the prophet John-The_Baptist, from the desert eating locusts and wild bee honey. Another view of how to look our relationship, our symbiosis with other beings is that all of the domestic animals, are willing to bring their contribution to us, as a sign of recognize our care for them and they give us their by-products, such milk, eggs, etc. But not to kill and consume them.
Another issue is that most cancer healers (those who really healed) recommend a diet completely without meat.
My personal experience, is that I quit eating meat from spring 2008, I feel great, very energetic. I managed to fight against a very terrible disease (and no, is not cancer!) after I listened the word of God.
I eat fish, seafood, dairy, vegetables, seeds, grains and beans, honey, fruits, etc. very important are seeds, sesame, lin seeds, then vegetable oils, olive oil, linoil (omega 3) but also omega from fish.
Many people afraid of lack of vitality or sexual energy, etc. All are nonsense!
 
 Soja we should eat with care, because what is out there, is more than 90% from GMO soja (even they say is organic), the chinese people are eating for long, but we are not used in our diet. People in Middle East which are rich and afford to chose, are not eating it.
The meat, has been eaten with  moderation by population at villages, in ancient times, once per week and for holidays, though they were healthy and robust. Once people level rise, started eating meat daily, lots of problems appeared.
From my personal research, I discovered that human body needs proteins (not entering scientific details) just for using part of their molecular chains, in synthesis of different enzymes and cell material.
So, there are three types of proteins:
1. Simple proteins-find in beans such chickpeas (hummus), beans, lentils, soja, mushrooms
2. Moderated compounded proteins - fish, eggs, milk, cheese and other dairy products
3. Very complex proteins, that are coming from meat
Types 1 and 2 are easily processed by the human body and are easily assimilated and disposed. The type 3 is very dangerous for body (can cause cancer) and very difficult to digest (asking for much more acid in stomach) and put much strain on kidneys (lots of urea and uric acid, could lead in time to gut).
The phenomenon of causing cancer, at physical level, has to do, that parts of complex protein molecules, are bypassing the cell membrane sticking into the DNA protein chromosomal  chain, causing a degenerated cell, which will be very difficult to be apoptosis-ed. This is the start of cancer in the body. Even this sound strange and difficult to proof or put in evidence, do not forget that meat is made of cells, containing their DNA and if parts of that DNA (resulting from different body chemical and physical process) could easily pass cell membrane (phospholipid bilayer of polar-nonpolar-polar structure), into the cytoplasm of the cell, by endocytosis.
At superior planes, I'm sure that is perfectly true, the previous mentioned word of God, about the desperate inner cry of killed animals, for their lost lives.
These are my experiences with no eating meat and I did not feeling the urge or something I miss. Sometime, after not eating long time fish, I feel that whatever I've been eaten (eggs, cheese), though I need some fish. After that, I feel extremely nourished and satiated.
If we want to be healthy we need to be in accordance and vibration of God and his creatures. If all part of our bodies are resonating with His vibration we will be healthy. The ailment is just a dis-balance, because of improper foods, thoughts or actions of us or someone else around us.