DQ,
That is an interesting story. You had my heart going there for a second until I realized that it was strictly for entertainment. I would think that drinking "mother's milk" would be the best possible thing for each species, not having tigers drink pig's milk and vica versa. Maybe after a certain age it is all right to inter-mix. I saw a special on the TV a few days ago about rhinos being hand raised by humans, and there was one that was separated from it's mother before it had a chance to drink any milk and they thought it would probably die because it didn't get any of the immune protection that the first mother's milk provides. I think they mentioned something about the placenta being involved. Anyway, I always hate to see animals behind cages.