Were they born with white hair, that would be OCA,
Were they born with yellow hair 0ca1b or 2...
Our son was diag when he was 4 months old. They said it was OA only. I knew in my heart he also had it in the skin. My son has yellow hair and deep blue eyes. His test can back normal for the x-linked (OA). Since his eye is getting more yellow and eyes a deeper blue we think he most likely has OCA1b. That is the blond or yellow version of albinism.
It is up tp you about the testing, but the hair is a big factor!
When they did the test, they took some blood from the foot, he did not make a peep...