I just moved into a housing situation that includes two smaller dogs than my two year old corgi, Barley.  They live as a pack and have the same schedule and are fine most of the time coexisting.  Though recently my corgi has been herding the samller dogs forcing them to higher points on the furniture to be left alone.  She is not aggressive towards the other two, just finds she must "push" them to where she believes they should be. 

I find this all kind of weird because my corgi is not alpha within the pack and most of the time takes the spot she is given within the pack. 

Any suggestions how to curve this behavior around other dogs.