I can often make killer deals by offering to buy large groups of animals that the vendor will no longer need to worry over. (petbusiness.com)
Yet even though the United States has a better reputation on food safety than China, U.S. factory farms have their problems as well in terms of the contamination of meat and the massive quantities of waste generated by large groups of animals. (treehugger.com)
Conventional thinking has been that sophisticated tool - making came in response to a change in climate that led to the spread of broad savannah grasslands, and the consequent evolution of large groups of animals that could serve as a source of food for human ancestors. (sciencedaily.com)