I just googled for how many lab animals are used in reseach in the US, and the number was ~800K in 2017. But (and this is a big but) rats and mice (and birds an

I just googled for how many lab animals are used in reseach in the US, and the number was ~800K in 2017. But (and this is a big but) rats and mice (and birds and fish) are not counted. For some reason, guinea pigs and hamsters are considered more equal than rats and mice. One supplier of lab mice in Maine provides ~3 million mice per year... Yearly production (and slaughter) of chickens is something like 60+ billion. Not sure if sentient, but perhaps they deserve it as descendants of the dinosaurs that terrorized human ancestors...