Diablo® III

So i finally obtained the staff of herding i go to act 1 normal find the cow to the right of the portal but i can´t click him.. what am i doing wrong?

You can only open the Pony Level that is of the same level as or below the level of your staff. for example, if you only have the Nightmarish Staff of Herding, you can only open up the Normal or Nightmare Pony Level. Once you have the right staff at the right game level, simply place the staff in your inventory and walk to the location. The cow ghost should automatically jump up when you approach him.

don't forget about spacebar spam of the npc's speach, as it is a rather long wait without it.

Esc key works nicely to skip conversations in one shot