Dark colored poos aren’t necessarily a bad thing. They are generally a sign of a diet rich in protein. What type of pellets are you feeding?

My buns have darker poos when they are eating darker coloured hay. When they eat lighter, timothy hay, the poos are light brown. It’s nothing to worry about. It’s the size, shape and firmness of the poos that matters.

Sounds fine – except that Orchard is richer than Timothy, and so Orchard will make the poops darker than Timothy. If you want to lighten the poops – try switching to Timothy hay.

I posted before reading the other posts – I agree with LBJ10 and Little Puffy Tail.
9 months is still young enough to be eating a richer diet, and orchard is not a bad hay. I used Orchard to get Lancelot to eat hay. Now that he does, I want to switch him to Timothy because it is coarser, and Lancelot’s digestive system needs all the help it can get. I definitely notice darker poops with Orchard. Your bunny’s diet sounds quite good though.