Hi I really need some support on this, my little girl suffers with constipation have been back and forth with doctors she is on lactose, however the last couple of days she has been quite constipated so I’ve been giving lactose and her poo is looking rather dark? Is this normal? She is well otherwise well & acting her normal self etc it’s just the colour that seems off from her normal colour unless this is old poo? She will be 3 years old in September ANY help or advice would be much appreciated, the poo is brown inside