Is my toddler’s poop telling me something sinister is going on?

My 2 year old has been doing poopies that are sometimes solid, but extremely hard or hard balls, for the last 6 weeks. They’re dark brown, sometimes black or something dark brown and black. 5 times in a month her poopie will hurt her.

She is breastfed but eats seeded sourdough, babybel cheese, drinks cow milk, drinks water, has pears, berries, durum wheat pasta with an Ella’s kitchen pouched mixed in, boiled carrot, cucumber spears, cream cheese, avocado, omelette with onions tomato and mushrooms.