It is clear that there is little love lost between Oliver and Orlando at the beginning of the play and that they, like Duke Ferdinand and Duke Senior, could aptly be described as feuding brothers. Orlando definitely feels that Oliver has not obeyed his father's injunction in terms of bringing up Orlando to be a nobleman. Note how he accuses his brother in Act I scene 1:
My father charged you in his will to give me good education. You have trained me like a peasant, obscuring and hiding from me all gentleman-like qualities.
However, in spite of the obvious animosity between them, it is clear that the magic of the Forest of Arden works a transformation in the character of Oliver, who becomes reconciled with his brother and what is more falls in love with Celia, pledging to marry her and deciding to live and die in the Forest of Arden and live as a simple shepherd. Note how the relations are completely reversed by the end in Act V scene 2 when Oliver asks for Orlando to consent to his marriage to Celia:
Consent with both that we may enjoy each other. It shall be to your good, for my father's house and all the revenue that was old Sir Rowland's will I estate upon you, and here live and die a shepherd.
Oliver's change in his relations with Orlando is symbolised by the willingness with which he relinquishes his wealth, that he at the beginning of the play was so reluctant to share with his brother.