I don't think there is any kibble that can be said to have too much protein for a healthy dog. Certain medical problems are different, of course. Usually a higher protein content will indicate a higher meat content, which many people strive for. Just be aware that the higher protein/fat foods are often higher in calories, too, so you will likely need to feed less. I feed to body condition, meaning I can feel ribs when I pet or pick up my dog, but can't see ribs unless the dog is taking a deep breath/sniff.
First time Chihuahua owner with many years of dog experience!