If there's one thing that adult humans really are NOT designed to consume, it's dairy products!
I believe if one wishes to be vegetarian because you think modern farming is cruel you would have more effect by purposely buying high welfare local products and encouraging those who are making steps in the right direction.
Also, permaculture school of thought says city dwellers should be meat eaters because it's cheaper to transport for the same nutritional effect. And surely it takes less fuel to grill a steak than to simmer a bean stew? And the methane produced by the human after eating the beans would be less than that after eating the steak?
In the UK large tracts of the landscape we value have been produced by hundreds of years of stock rearing - to be strictly vegan you shouldn't look, or something.
Jennifer
And I have eaten meat I reared and killed, by the way, felt very good about that. Seemed right.