Like Liz I don’t do animal testing – though I recognize the value of drugs that have been tested on limited numbers of animals to minimize the chance of harming the first people to use them.
More broadly I am involved with research on animals like in Cornwall I am involved in a study looking at the movements of cattle and badgers using GPS collars (bigger ones for cattle and littler ones for badgers). The data collected help us to understand how often badgers and cattle come into contact and where/when these contacts happen. Any use of animals, even putting on a GPS collar, in research is strictly regulated with lots of checks to ensure the welfare of the animals. (We’d never use a heavy collar that would weigh an animal down.)