They do it all the time. Unfortunately, they legally have the power to do so which is why our doctors say do not use Walgreens. And sometimes Walmart depending on which town. But bet the ivermectin policy is in fact a Walmart practice. And yes I too have heard they are largely owned by China. When my ex worked at the paper mill yrs ago I recall a Chinese company had come in and bought out or bought part of the well known company. And it’s names since have never implied Chinese ownership!