In general, scientists perform tests on animals with the aim of reducing human suffering and saving human lives. However, if you think about it animal testing requires no consents from animals to tests and tests proceed while for human it involves a decision to consents. Similar to us, even animals get pain, suffers discomfort under these experiments. Therefore, I think animal suffering should be minimized. If under special circumstances, scientists are to do animal experimentation then one important point is to consider ethics on animal testing and certain guidelines should be followed. Such as experiment procedures are to be reviewed by the animal care committee to make sure test is appropriate and means no harm. The scientific purpose of the research should be potential significance to justify the animal use in the experiment. Animals should be respected, not abused, and a test is to be done under the animal care supervision.