Consider the question, "Does a new, special kitten food add more mass to a young cat over a period of several months than the original cat food?

14. A good control setup for this experiment would be to feed some similar cats the original cat food. (We can't use water in this case, as that won't feed the cats!) We can then control the results of the experimental group (those fed the new kitten food) to the control setup to see if the new food really is better than the old.

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