My sulcatta is about 9" and is in for the winter. She is kept in a 10 x 6 table. I did an expierement with both foods. For two weeks I mixed Mazuri with springmix and some optunia. She ate it all of course and the results were good but her waste was a little on the softer side but not runny. For the next two weeks I fed ZooMed grass land with the spring mix and her results were different. She had much more waste and it was on the dry side with alot of fiber in it. I would say she has been more active and alert with the zoomed then the mazuri. Right now she is getting some western timothy and orchard grass on certain days and a mix of zoomed and mazuri with springmix on the other days. The keeper at the River banks zoo in SC believes in commercial diets all there birds are fed zoopreem mixed with fruits and veggies and there torts are fed mazuri with a ton of greens. They use mazuri because of the discount they get from them because all there mammels use mazuri. Sorry so long. Jay