Their memories I would assume become part of their instincts like fear of predators and what is food. Of course they look confused when something moves out of view DV lol! They almost always look like they're staring into space. It would be an interesting study to find the extent of their memory capacity. They probably do have more short term than long term, but they do have some long term memory. Recognizing objects and people, and even voices.

Don't worry about sounding like you're disagreeing with me. I feel if you're not comfortable with a feeder don't use it. Better safe than sorry.