Hydrogen peroxide can bleach feathers due to its oxidizing properties. It breaks down the pigment in the feathers, causing them to lose their color. It is important to exercise caution when using hydrogen peroxide on feathers, as the strength and concentration of the solution can vary. It is recommended to dilute hydrogen peroxide with water before applying it to feathers. Additionally, it is important to only use hydrogen peroxide on feathers that are clean and free from any oils or dirt. Before attempting to bleach feathers with hydrogen peroxide, it is advisable to seek guidance from a professional, as they can provide the most accurate advice on the appropriate concentration and method to use.