39. Chihuahua
When people look at a chihuahua, they likely think about a small dog that is always angry. Nevertheless, there is more to this breed than people give them credit for. They’re incredibly loyal, so you have a friend for life, and they tend to love anyone they meet. Unfortunately, most people carry them around because of their size, which can give these dogs a complex. They simply love the attention to the point that they’ll do absolutely anything to get it, including tricks or simply pushing their way into your lap. They can live a long time, but they’re prone to many health ailments, such as eye infections and bronchitis.