I get to read comments like this - definitive statements that are 100% false.

There are a ton of laws around animal testing. If you want to run an experiment like this you need to go through hundreds of pages of regulations to make sure you follow all of them. Then you need to go in front of a board who will make you justify the work (only allowed if there is no alternative), and discuss at length exactly what you will do to the animals, what you will do if things go wrong, how you will monitor their health, what you will do with the animal once the experiment is done. All the while you need to show you are doing you best to alleviate any suffering, including administration of anesthetics and pain killers.

This is also false.

There is a very comprehensive law outlining the laws around animal testing along with hundreds of pages of regulations that go into exquisite detail on what animal testing is allowed and what efforts have to be put forth to minimize pain and suffering.