Assalamualaikum! Najis bayi FM memang selalu varying dari hari ke hari, sometimes kuning, sometimes greenish, texture pun boleh berubah depending on what they're digesting lah. Kalau baby aktif, feeding well, dan diapers frequent (kami biasa expect 6-8 wet diapers sehari), biasanya okay je. But since you're worried about the colour or consistency, best to show your paed or nurse, they can see it straightaway and give you peace of mind, sebab setiap baby beda!