We can help you better if you tell us what steps you followed. Egg tanning can be just as good as brain tan, but you have to follow specific steps in a specific order. As someone else said, you may not have worked at softening long enough. After the egg soak you have to soften until the hide is completely dry. There are many ways to soften and each requires constant motion and stretching of the hide. If it is not too humid and pretty warm, this may only take 4 hours. If its cool and humid, it can take 8 hours or more. When a hide comes out stiff, you can re egg it and soften again. So , let us know step by step exactly what you did and we can help uncover what went wrong.