HA! My dog remembers every place I’ve ever stashed snacks in the last 5 years and every day he makes the circuit checking to see if I might have done so again.
Yep and if I tell my dog she gets a treat for going outside she heads right to the treat stash after she does her duty...
Sure, but that’s classical conditioning, e.g. a reinforcement is given for a behavior causing the frequency of that behavior to increase. And dogs have very keen noses, so they can easily follow those scent clues that are invisible to us. Amazing animals, but their memory is based on experience rather than reasoning.