I had the same thing happened to me. I found a kitten on Aug.4th Sunday and took her to the shelter the next day to be fed by a catmom, but she rejected him by Wednesday. I picked him up Wed. Morning and she was fine and screaming and drinking from the bottle every 2 to 3 hours. Friday morning she took her bottle at 9:30am and had a good appetite. By 12:30 that afternoon she would not drink any more. She kept on falling to her side as I tried to feed her. I was so devastated and I tried to feed her with a syringe and that didn't work either. Her poops were very hard the day before, almost like cooked rice. She died on Aug 9 Friday at 11:15 pm. It's so hard, because I became so attached and so did my two kids.