Have you given your tort store-bought greens like spring mix, kale, spinach, etc.? Greens (meaning store-bought greens, "weeds" like clover and dandelion, and grasses) should really be the staple of his/her diet. Also, how much exactly is s/he eating? It may not seem like enough to you, but may be just fine for him/her. After all, hatchlings have pretty small tummies. A rule of thumb is to only put out what your tort will eat in one sitting and if there is extra to then take it away when s/he is done.