Dogs somehow mirror humans at times. Even when the young does not belong to you, there will always be that drive to take of that young one. Take Zoey for example... she loves taking care of puppies at home - purebreed and hybrid.
Despite being different in breed, they will get along and take care of each other. This is something humans must also master - no matter the shape, size, or color, we need to take care of each other.
The effort of one can start the spark to move the rest to action.