Here is an update for you on what the Rylie Bug will eat. (Click the links to see the full lists.)
Rylie, in her pull-up and shoes, showing off her tree decorating skills.
More on SCD:
"What Do Your Kids Eat?" which explains Hayden's diet as well.
"Breaking the Vicious Cycle" is the book that explains the diet.
Also... Blog Posts regarding why Rylie needs this diet: