It's corporates belief that it is upsetting to the customer to know that the mice/rats will be food. The f/t are kept in a cooler labeled "Reptile Food" that way only "reptile" people will see/ know of the f/t food. All other customers go along oblivious to this and see that we sell "fancy pets".
It is true that employees are given limited training on animal care, but I think it comes down to each individual employee to do the work. If your going to sell an animal to people I think it is your responsibility to do the research and make sure you know proper care and husbandry. Otherwise you shouldn't be talking to customers and selling animals. Like I know nothing about birds so, I don't sell birds! In a corporate business like this it can't be blamed on the top officials when the employees as the base aren't doing the work to stabilize the pyramid.
Bingo! Petco's policy is to feed f/t to all snakes in the store. If we get in a "picky eater" I have to go buy rats/mice from another local pet store so that I can feed live. I cannot just take a mouse off the floor. They are "pets" only and not food. Do they become food, yes all the time, but Petco doesn't want to know that.