It is important to remain mindful of this truth, so that we continue to question our care-giving practices. It is entirely possible that ideas that we hold to be true today may very well be proven foolish as time passes. A good example of this is the theory of "height dominance," which states that allowing a parrot to perch up higher than the owner's eye level or on the owner's shoulder will result in a parrot who believes itself to be the dominant member of the relationship, resulting in non-compliance. While most avian behavior consultants accepted this theory as fact for many years, voicing warnings to always keep parrots perched down low, it has now become clear to many working in the field that there is little truth to this.