I am fostering 3, 5 day old kittens. One kitten passed overnight, even though she had a good day yesterday, eating more and gaining weight, she didnt make it. Now another kitten is losing weight, When i got them on Tuesday, she was 88 grams, now shes 68 grams. over the last 24 hours, she eats about 2-3mls every 2-3 hours. She has pooped 2x yesterday, all good there. I dont know what else to do. I am now constantly checking her temp. I feel shes slowly fading away. Any advice?