There's a woman down the road from me with two Westies. One is okay but the other is really quite aggressive but when the aggressive one gets aggressive she sets the other one off. So, two aggressive dogs really.
I've got a rescue border terrier who's growing in confidence but can be still quite nervous. Every time we pass this woman, her aggressive dog has a go at my dog. When they're far apart it's okay, my dog won't give a shit but when we pass close my dog gets very jumpy.
When her dog has a go at mine, this woman laughs and says 'Oh she doesn't like border terriers'. But I've seen her dog be aggressive to all breeds, not just border terriers 
. Plus, I don't actually see what's funny about my dog cowering against walls whilst her dogs bark and snarl without any sorts of correction. Maybe that's just my sense of humour failure though.
Last night we passed in a narrow alley way. When I saw them approaching, I stopped, blocked the path between her dogs and mine and bent down to stroke my dog until they'd gone past. This stupid fucking idiotic woman then stops right next to me and starts talking to my dog whilst her dog is going nuts at the end of it's lead. My dog is really confused, cowering and desperate to get home (we're about 10 meters from the door).
So I said to her 'We're waiting until you've moved on' or something to that effect. To which she said nothing and just carried on talking at my dog.
So I snapped at her 'Can you just walk on please, my dog's terrified'. She did move on but huffed and puffed down the road muttering at what a rude woman I was.
I'm hoping she'll avoid me now she thinks I'm rude!