A year or so ago I mostly would have agreed with this but there are exceptions. I had a foster dog who was the opposite of everything I ever imagined about a chihuahua. She was curious about everything instead of afraid, only peed outside or on the piddle pads during training, didn’t shake unless it was actually cold, and didn’t really bark, even when we kept her separate from the rest of the house during the introduction process. She was friendly to any people she met and loved other dogs and cats. She was a quick learner with tricks and desperate to please. She was all-around super chill and honestly I should have kept her and immediately regretted letting them adopt her out. What prevented me from doing so was… my prejudice against chihuahuas and being seen as someone who owned a chihuahua. It was dumb and I regret it and miss her all the time. I hope she is living her best life out there in the world. So hashtag notallchihuahuas! (My neighbors also have some pretty chill chis, but foster Pixie was the shit. Great little dog.)