I rescued a 4.5 ft female about 7 months ago. She weighed 454g. They estimated her age at 7 yrs old. She had obviously not been fed properly, so that is what I did. I fed her every 7 days. They had been feeding her one weanling rat every 4-6 weeks., live. She had never had f/t. Her water bowl was bone dry when I picked her up. So I made sure she had a nice bowl of fresh water. Settled her in, and offered her a f/t small rat. She struck it immediately, I barely had time to wiggle it. The same night I brought her home. I kept her on a small f/t rat every 7 days until she gained some weight, then moved her up to 2 smalls every 7 days. Mediums were still too big for her girth. She just this week moved up to mediums and weighs 1400g now, give or take a gram or 2. She just needed to eat and have nice fresh water. She is a sweetheart of a snake, not the least bit aggressive. Now she looks pretty healthy for her length. Just keep her comfortable, and feed the poor thing....lol. In a few months you won't believe the difference! Good Luck!