This nice video takes you on a tour of a dairy farm and the importance placed on farm animal welfare. I don't believe the profit-motive is a necessary condition for humane animal production, but that it depends on the particular animal species. Dairy, beef, and chicken production are, in my opinion, industries that generally provide acceptable animal welfare. My definition of "acceptable" is that the animals have a life worth living, even if their lives could be improved. Because their lives are mostly pleasant, one could consider it ethical to consume beef, dairy, and chicken products. But don't take it from me. Research the farms yourself.