I have been doing a lot of reading on this issue since I got my baby sulcata. From what I have read, pyramiding is the result of too much protein in their diet. People tend to feed too much lettuce or green leafy veggies. The books and articles I have read say 75% of their diet should come from grasses and weeds and the other 25% can be rose pettles and dandy lions and other items like that. Only an occaissional piece of green lettuce should be given. It sounds as though the pyramiding is caused by too much of a good thing. I am going to follow the feeding instructions laid out by a book I bought from a reputable breeder as well as the things wriiten here:
http://www.anapsid.org/sulcata.html
http://www.sulcata-station.org/
Good Luck