Dogs can count. and :)

The acquaintance was going to go to the hospital for examination and treatment, for up to 1 month. I asked to take care of my 1.5 year old dog.
A friend lives on the 5th floor, I am in another area of the city, in the same house, on 2. The dog had a favorite ritual: entering the entrance, she sat down and waited for the guide to be turned into a tight burn and given to her. She took it in her teeth and went home by herself.

As soon as I brought the dog home, my apartment, where she had never been, she found my smell. She ran into the entrance in front of me, breathing, and sat next to my apartment, causing surprise.
The next day, after a walk, the dog sat and waited for the guide and she got it. The experiment was not very successful, as I caught the dog between 4 and 5 floors. and :)
The dog was returned to the owner in a month, as agreed. My acquaintance called today. She says that on the way home, on the 5th floor, the dog sits on the 2nd floor, next to the same door as I have, and in her gaze it is written: "Miss, we are not here? Are you sure?"
and :)