One of the most rewarding parts of our relationship with dogs is how we humanize them, they seem to smile at us, speak and understand our feelings. But in the end we are just putting a human layer on an animal with a brain that is still a mystery to us. What we know very well is how to train them, we study their reaction to certain basic stimuli and take advantage of it to get them to perform a specific task. This method was set thanks to the behavioural studies developed by physiologist Ivan Pavlov. Now, more that 100 years after, his research became relevant again because we have to deal with a new kind of mysterious brain that needs to be trained: deep machine learning.