Cuckoo posted:

They may be hardier than a lot of dogs in the toy size but Chis are also almost always, to a T, incredibly high-strung aggressive little shits. I've had more than one offleash Chihuahua run right up to me, growling and snarling at my shoe.

The only two consistently mean dog breeds I've ever run into, and this is talking about trained housepets and not poorly-raised guard dog breeds that have gone into a psychotic rage from being neglected and tied to a tree, are Chihuahuas and Shih-Tzus.