Oo normal yan, mama! Ang dark or blackish poop after CS is usually from the blood sa loob during surgery, at it should lighten up in the next few days as your body clears it out, happened din sa amin and sa maraming CS moms I know. But if it's still dark after another week, or if may foul smell na sobrang laki or may other symptoms like fever or severe cramping, better check with your OB just to be safe kasi gusto natin makita mo fully recover okay na okay. Ingat sa sarili mo at hydrate well, mama!