The single most distinguishing characteristic of most puppy mill operators is their desire to produce puppies at minimum costs with minimum effort, regardless of what is best for the animals. (maal.org)
As the name implies, the main distinguishing characteristic between CFCs and (treehugger.com)
For example, human males tend to be larger than human females and they also have other distinguishing characteristics such as stronger brow ridges and more facial and body hair. (sciencedaily.com)