My kids have already become strict vegetarians while I'm beginning to become one. At least I don't eat red meat or pork, My decision was based on the economics (use of land vs nutrition) and on distribution of food world wide. By cutting out beef, pork, sheep, and goats as food sources we can live longer and so can the planet. Mice studies have shown that more protein in the diet causes the mice to grow faster, but the mice also age sooner and die earlier.