Under controlled experimental conditions of temperature, time, lighting, feeding, and training, the organism will behave as it damn well pleases.
-The Harvard Law of Animal Behavior
This is one of those gems I plucked from The Blank Slate. Research involving animals (or small children) can, I gather, be horribly frustrating.
Having tried to modify my cat's homicidal behavior in times of unwarranted optimism, I can completely empathize.