I wonder if the answer to this question would be less obvious if the animal of choice was a cute dog rather than an unappealing rat. It's interesting to note the marketing techniques used in these types of advertisements.
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My question is... do we have to choose? Does the cruel animal testing that occurs in labs really save human lives? The documentary we watched revealed that much of the animal testing does not further human life or happiness. We have advanced technology that is a much more reliable tool than animals. Many of the doctors in the film even said that they would never prescribe a treatment to a human based on a study with animals. Just something to think about.