aka Atlas Blue, a Weimaraner I raised for exactly 13.5 years. Over 120lbs in his prime. The ONLY thing that ever bothered this dog was anyone wearing a hat, mask or camera on face. Over the years, I've found many dogs are fearful of a DSLR or anything covering a human's face.
I am a human who was bitten by a dog somewhat randomly when I was young, and lived in fear for years. Age 19, I had fully overcome that fear with some effort. Today, I have photographed countless dogs and helped many new dog owners with whatever the 80-lb baby has gotten into today. BLS has the right to refuse service to anyone if the Photographer feels the safety of herself or her gear may be at risk.
Ami Lisk, circa early 2000's with a Kodak Easyshare with Photoshop CS2 to apply some sort of "paint" filter.