Simple: Think of something-anything. You used a word-in your mind. Wind in your face represents something to you in your mind. Good, bad, indifferent, etc. That something will always be represented by a word inside us. Dogs do not have words. That doesn't mean they can't process some human language. Here's another article on that. Note the comments by the neuroscientist at Emory University. We know this because that is how dogs can respond to commands. But we can train a dog to sit by saying the word "run" enough and providing a reward so eventually the dog will process the word run to a far different meaning than what we give it-namely sit. So in order for a dog to get up and go to a train station every day for 10 years we humans try and understand it by saying he "thinks" the owner will be on that train. But that thought process takes a language full of words. And those words are what we humans put inside that dog because that is how we would "think". Now the dog, if it hears a train whistle every day and goes to the station every day it's likely its because of pleasure he has experienced in the past. (i,e, his owner getting off the train). It doesn't mean he's sad when there is no pleasure and the next day with the train whistle he's off to the station again for the same pleasure. Another way to look at it: Train whistle-reward at home. After a while train whistle and no dog at station as long as the reward at home continues. The master not getting off the train has nothing to do with sadness but simply "no pleasure". If someone at that station is giving the dog a bone every day when the dog shows up the next day it has nothing to do with expecting Richard Gere to get off the train.

[www.usnews.com]