Aiyoo, memang pelik bila tiba-tiba jadi macam ni kan, especially dah tried berbagai susu pun sama. A few of my mum friends went through this around 1 year old, sometimes it's just their digestive system changing or they're drinking less milk sebab dah makan more solid foods, which changes the poop consistency. Tapi sebab dah lama macam ni, better check dengan doc to rule out anything else like intolerance or infection, especially since dia dah tried different formula pun still the same. Hang in there, mama, usually it sorts itself out, tapi the doc can put your mind at ease!