Pit bull now stops in his tracks at the mere sight of my spray bottle. Still comes charging out from the house to the road but stays just out of range of my spray. I still fire off some shots in the air behind me, happily marking my territory. Still consider dog to be a threat. Am going to order pepper spray. I'm thinking about designing some type of automated delivery mechanism for ammonia. I would like to have pressurized ammonia spray come out of between three and five different nozzles mounted on the frame of my bike. It would be alot more convenient to be able to spray ammonia at five different angles at the touch of a button. Anybody got any ideas?