Xanthomas
Xanthomas are yellow- or orange-colored skin tumors composed of lipids and cholesterol. The area is usually thickened or raised with dimples. These growths are often found in the breast area, thighs or wing tips. Xanthomas growths are invasive and usually require surgical removal. These types of growths are most common in budgies, cockatiels and cockatoos. The cause is unknown, but high-fat diets are suspected.