Moderate feather plucking is when a bird has large areas of feather damage and the problem has turned into a habit. We've found birds with moderate plucking respond better to a thicker, stiffer bid collar. Our thick, stiff bird collars have been tested and are a reliable way to interrupt the feather plucking cycle with most birds. But, you'll also want to consider a comprehensive level of support by offering nutritional supplements and learning behavioral techniques to retrain your bird. Find out more here.