1. Lunging without conducting a straight-line evaluation.  While it may not always be possible to get good consistent straight-line data (in which case lunging can help), lunging can complicate an otherwise straightforward straight-line evaluation. It is important to remember that reference ranges for asymmetric head and pelvic movement have not been established for lunging. Because lunging induces torso tilt, which can affect head and pelvic movement symmetry, and this effect is also surface dependent, lunging interpretation is more complex. Increased variability inherent in lunging can increase the difficulty of evaluation. If the lameness is measurable and consistent (repeatable with 2 contiguous...