You shall not pass dog

You can read stories about brave dogs all the time: dogs catching venomous snakes, saving drowning people, protecting their humans against attackers. Nothing seems to be able to stop them. There is however one obstacle they can't seem to overcome: cats!

Cats are the gatekeepers of your house. How much your dog may long to pass, be it on the stairs, a narrow hallway or a doorway, if there is cat they won't.
You see can see and feel their pain - but in the end, they have to recognise who is the master of the gates.