I used to have a whippet that used to be able to open all the doors in the house until the handles were turned upside down , but it worked it out eventually , the fridge handle was moved to the opposite side to stop it raiding it which it did regularly beforehand, it also worked out how to open the garden gate , ran down to the butchers and waited for a bone , then carried it back home and sat on the driveway chewing on it , and they say they have no brains!