cotton and polyester puma sock I washed with some pooped underwear, so I don’t know if this sock looks brownish due to fecal matter.
I used a cold cycle and abundant detergent. Every other undie looks fine.
I don’t know if I should leave the piece to rinse in a cold water bucket with some detergent and wash again.
Some kinds of black dyes are actually just really dark brown. When they start to fade they turn lighter which reveals the brown colour. There’s no way a poop stain transferred to your sock in the laundry. The enzymes in laundry detergent break that stuff down and keep it suspended in the water.