I recently got a 2.5 to 3 foot ball python. The previous owner fed him two mice every two weeks. She was feeding live, and I wanted to switch to f/t. The pet store was out of frozen mice and suggested a small rat. I had no problems switching from live to f/t or from mice to rats, he took it eagerly. My question is, is a small rat in place of two mice equivalent? And is either option enough every two weeks? I feel like I should offer him a feeding every week... he seemed to be looking for a second rat. How can you tell if they are still hungry?