Absolutely. They maybe cannot talk, but they are communicating something! It's up to us to understand the language. The leaves aren't the problem, the problem is within the soil. The relief is that an avocado plant can die in a couple of hours to 12, and that means that they want to live. They are also saying that. So, this time it isn't about us or @englishtchivy talking to a plant, but doing something different as learning a little more about them and gifting them a better treat! Cheers.