Walmart stocks their products or new shipments on a for-need basis, which means that when the need arises for a certain product, it will be restocked. Locations of products depend on where they are most requested and there is no set time frame by which the items are restocked.
The more important question is about what Walmart supplies in order to have healthy humans and animals in society. Simply put, my concern has been with how classist their food distribution system is, as healthier food are usually not available at all Walmarts because these stores focus more so on cheap prices of unhealthy foods such as processed foods or animal flesh.