Thanks Tim.
My favorite chuck breeder is Nick and Austin Dokai (Innovative Ectotherms) and they have a great care sheet for chuckwallas at
http://innovativeectotherms.com/chuckwalla_care.html.
When I try to fatten my chucks up after they have laid eggs I use the mixed frozen and thawed vegetable bags and add extra green peas. I still feed their regular greens and put the thawed peas and veggies on top.