This can be slightly more labor intensive, but if that intensity is increased because it is done to enhance the sheltered animal's life you can consider this a good sign and a better form of customer service in the proactive sense. Being aware of how much influence each of you has on every animal that comes into our path is awe inspiring. The animals rely on YOU for their every need and for YOUR guidance. Applying simple strategies on a daily basis establishes consistency. This will result in better behavior without large blocks of time devoted to this specifically.
Daily application is necessary.
Most dogs learn to be obnoxious to get any type of attention. Ignore the bad and praise the good. Reinforce good behavior with attention and occasional treats. This will decrease the occurrence of the inappropriate behavior. This gives the animal an acceptable option instead of the undesired behavior.