lens flare? Try cleaning the lens and shooting again next time the dog growls. I've had experiences with things that appear to be supernatural or beyond normal experiences. I do know that animals can sense things that humans can't and I believe there's much we don't know. I've had my animals stare up to look at something and keep looking at times. I once had an Indian tell me that animals can see spirits. I know it sounds far fetched but I don't think Man is anywhere near the intellectual giant "he" thinks he is. I think there is far more left to learn and that we are still babies in a universal context. There are far too many ghost accounts for there not to be something to it. Everything from recorded EVPs to unexplained movement to apparitions and then there are residual "haunting's" that seem to moments trapped in time that keep repeating themselves. It's as though some items or geographic features can trap energy and retain it. And then there's outright evil activities that are often referred to as demonic activity. I do think the secular "blinds on" nothing else exists other than us is short-sighted and not so intellectual. I think there's good reason that some people are referred to as educated idiots...lol