First time my daughter wore these boots she walked through a wet lawn and discovered the brown dye bled onto her white socks and through to her toes!!!  The boots never dried back to their natural color, insted, the dark stain stayed - looking like the boots are still wet after days.  Don't really know what happened.  Amazon Prime was great and accepted the return with no problem.  Amazon is an authorized dealer for UGG so I wouldn't think we got a fake.
I am now rather concerned about the quality of UGG products - for the price I wouldn't expect what happened...