Those are excellent points. I was thinking that a dietary dependance on cow's milk would suggest a symbiotic relationship that I don't believe exists. But it may be possible to use goats & fish aquaculture too especially if they compliment each other well as part of the ecosystem. Slaughtering livestock for meat might be bad for public relations. Eating fish might be ok, but I would tread lightly on this aspect if I were NASA administrator.
One additional point is that a self-sustaining colony should have representatives of all age groups to keep the birth/death rate relatively constant. This is called an age pyramid, and could also be used to optimize the size of cropland needed for food. For example the food guide recommends the lower range of food servings for a child, and the higher range for a teenager. Most people are somewhere in between.
Space/Science » in reply to Re: Growing Food in Space
Re: Growing Food in Space