PATH: Nature
DISCIPLINE: Shepherd

From official UXO.ea.com Website:

The shepherd is both a teacher and a student of the creatures of Alucinor, communicating with animals to exchange knowledge and summoning animals in times of need. A learned shepherd becomes one with the creatures she comes to know, even to the point of taking animal form. In this state she assumes the natural abilities of the animal - both its strengths and its weaknesses.

Little more is known about what the Shepherds of Ultima X: Odyssey will be like, but we do get at least a hint about them from the details found in Ultima IV literature. As one of the 8 Classes of the Fellowship, here is what it has to say:

SHEPHERD: It is uncertain whether the Shepherds are skilled in any form of warfare or in the mystic arts. However, they are highly valued traveling companions for their humility and their knowledge of the ways of the land.