A pediatric nutritionist is a registered dietitian (R.D.) that has specialized in nutrition for children, so you must first become a registered dietitian. You could enroll in a bachelor's degree program accredited by the Commission on Accreditation for Dietetics Education.
Here is part 1 of Cockatiel Types and Descriptions which covers 5 types of cockatiel types including whiteface, lutino, albino, normal greys, and pied. Each ... Here is part 1 of Cockatiel Types and Descriptions which covers 5 types of cockatiel types including whiteface, lutino, albino, normal greys, and pied. Each slide gives a bried description of what each type looks like, and includes a photo. Please watch part 2 for more types. Thanks for watching. :) I own none of the photos shown in the following video.
The solid white cockatiels, with red eyes, are actually the lutino (the solid yellow/white body) and the white face (the lack of a cheek spot, and the lack of any yellow or orange pigment) mutations combined together, making the bird totally and completely white (with the red eyes of the lutino), If the bird is pure white with no color on the cheeks or crest but the eyes are dark and not red, then it is a Clear Pied (some call them Dark eyed Clear) it still is not an Albino