That dog looked to me like all smiles. I don't care for loose dogs but he just seems to be happy having escaped his leash for the day. He didn't appear to be on of the more scarier breeds either. I don't know if you have a Cabela's down there, but you can buy UDAP Pepper Spray, I bought it after I got tired of pit bulls running down on my dogs over the years just in case. Online reviews by bicyclist who have used it to stop advancing pit bulls highly recommend it. You'd want the fogger not the streamer, the streamer would require getting it in the eyes to stop them.