Thanks Em, that does make sense. I was talking with Sherrie earlier today and she's experimenting with different color and fabrics of clothing. Sure enough if she puts on anything that is a true red (burgundy doesn't trigger) this one particular female iggy goes nuts. Change clothing color (fabric doesn't seem to matter) Iggy is back to her quite nice for an iguana temperment.
I'll let Sherrie know what you figure is going on...thanks!