Nancy Clark had a column today that among other things suggests

use the referral network at www.SCANdpg.org to find a local registered dietitian who is a Board Certified Specialist in Sports Dietetics (RD CSSD)

Also - @Catrin, I don't remember which thread it was you posted in, but I knew instinctively it wasn't right to eat less on rest days, and Clark confirms this. Rest days are when your muscles and bones heal and re-build themselves stronger, and they need nutrition to do it!