Certain pellets are designed to be fed to breeding birds or feeding babies. These pellets are not meant to be fed year round. Hand feeding formula is fast growing babies and should not be fed to to birds that are juveniles or adults. Sources for vitamin D include alfalfa, eggs. oatmeal, and sweet potatoes. Unfiltered sunlight helps convert vitamin D3 in the body.
Vitamin E improves circulation and repairs tissue.
It has been found to be helpful in many birds that feather pick. Vitamin K is needed for blood clotting. Conures and Mini Macaws appear to require more vitamin K than other species It is found in alfalfa, broccoli, dark green leafy vegetables, soybeans, blackstrap molasses Brussels sprouts, cabbage, cauliflower, oatmeal, and wheat. Iodine is important to proper thyroid function. When most birds were on an all-seed diet.