Manifestation Test

The manifestation test is taken in your sixteenth summer, and is a way to prove that you are able to shift and so earn your place within whichever clan you are part of. The four clans administer the tests slightly differently, due to the different cultures within the clans. But at its core the manifestation test contains two parts.
In the first part a few drops of your blood are dropped onto the clan crystal. If it recognises shifting ability within you then it will flash in different colours. If you are successful in that part then you need to prove your ability to shift. The quicker and easier your shift, and the better your animal, the higher ranked you are able to become within the clan. Those who can only partially shift are relegated to side roles and take no further part in the running of the community.
Once you have passed the test there is a big feast. All successful candidates are then able to take on an apprenticeship within the clan, depending on their strengths. Often this takes a few days to sort out and agree with everyone.
Those who fail the test are classified as human, and lose all privileges of potential clan membership. This doesn't happen very often, as nearly all children of clan members have the ability to shift to some extent. And humans are never tested as they are unable to shift.
If there is any doubt about the parentage of a child, then they are more likely to be taken to one of the smaller testing locations. Then less people will witness the possible failure. But for the audience, those people provide more entertainment as the result is so uncertain. While everyone else is a foregone conclusion, and the only uncertainty is how well they will be able to shift.