Mitzi is agressive towards other dogs. She snapps at their noses as soon as they come close enough. She would also run towards them to get them. She is rather shy with humans and hides behind us. Mitzi was never socialized with other dogs b/c there where no 'suitable' small dogs around when she grew up. She was also the biggest in her litter and the 'boss'. When we meet other dogs we pick her up and always get this:"My dog is friendly!" comment what we have to answer with:"I'm sure of that, but this little Yorkshire Terror isn't!"