Bitter Apple is a maybe thing for some dogs... I have known some dogs that eat that stuff like candy, go figure!

I have done the 'bad dog' thing with the bike between me and said doggy, luckily i was already dismounted. Should have seen that dog's confused little face when suddenly it's target became big bad shaky bike thing with a deep booming voice. It ran off with it's tail between it's legs!

Never been chased by a dog while mounted, but was chased by one while running the other day. I stopped running so it wouldn't chase and tried to yell but luckily the owner came out and pulled it in (and don't EVEN get me started on dogs that are not leashed or fenced when their owners aren't present....)