Sometimes when smol dog sees other dogs, she decides they need to know that they are Wrong. I can't really tell her off when she gets this into her head because she's too busy standing on her back legs and building up to a shout, so I have to warn her that I will publicly embarrass her if she carries on.

If she does carry on, then I pick her up and noisily kiss her head.

She's usually so embarrassed by this when I put her back down that she decides the other dog can go and be Wrong after all.