Now, it's true -- scientists often push back at me, and they'll say, "Ah, look, the animal might be stressed, or maybe the animal's just confused because his or her routine has been disrupted."
Ahora bien, es cierto  que los científicos suelen objetarme diciendo: "Bueno, mira, quizá  el animal esté estresado, o simplemente confundido, porque su rutina se ha alterado".