He looked funny, but the hair grew right back. Within a month, he was perfectly fuzzy again. Hay, as I understand it, is certainly an especially important part of his diet now. Make sure all his hay boxes are full. You can bet he's grooming himself when you're not looking and eating some of it.
All bunnies eat a bit of their fur, but the hay keeps it from being a problem.
Even when they just go through a shed and not a molt, however, mini rexes do shed a lot of their fur. Same suggestions for a normal shed. Let me know if you have any other questions, as I'm not sure this email described everything. We have a velvet mini rex, male, about 3 years old.