I sure hope humans won't be raising livestock in Heaven the way we've been doing it on Earth. The experience of most livestock today is unnatural, scary, and painful. They are essentially in Hell from birth to death in our "factory farming" slave system. Even livestock kept "humanely" live in bondage, no right to have a natural and free life. So Heaven would be a place of peace and happiness for human animals, but suffering and sorrow for non-human animals. Doesn't sound like anywhere I would like to be! So I hope our understanding of it is incorrect.