My Fat Farm is a small operation. I have two dozen chickens and a dozen or so ducks. Since we are small, our feed is bought in 50lb bags that the nice young men at our local farm supply store try to put in my cart for me. They don't then carry it to the car, load it, drive it home, unload it, and dump it in to my bins. So no, they don't put it in my cart.
More times than not, I forget to buy feed. This is only stressful for me. The critters don't mind at all. My forgetfulness means they get a hot breakfast of blackberry oatmeal.