No, any animals nearing extinction are not tested on. Only common animals are used.
No animal should go extinct none of them are useless we all need them
dipthong
For various reasons. It might be a natural disaster or alteration in the climate, as with the dinosaurs. Many endangered species face loss from over-collection, hunting, loss of habitat or food...
it messes up the whole food chain.also certain animals keep their environment in check.