usually animals used on this tests end with no eyes, ears, skin and with weird extensive wounds
the idea of use animals to test such products is avoid people ending like those animals but if those animals end that bad before being sacrificed, such products should be just banned completely, not just choose what can be tested on where
some products are made for medical purposes too but what are they testing, what chemicals are they using
now, if a human let that happen to him/her voluntarily, well, what can i say there?