Do all Chihuahuas have ears that stand straight up? If they are breed standard then yes, their ears most likely will be standing up. But all Chihuahuas are not created equal. Some of us may not be well bred. I personally blame my biological parents. My ears mostly don’t stand up. Sometimes one droops. Sometimes they both do. And sometimes they’re both up. Especially when I’m alert and walking fast. The wind helps inflate my little ears.
But research has shown me that if your Chi’s ears are not standing up by 7 months of age they probably won’t. It all has to do with genetics and muscle strength. What can you do. Please don’t torture your Chi by taping his ears. How would you like someone to do that to you?