Hi there, the poo looks fine. Sometimes there will be bits of color in it just like in the darker part. As for the supplements it would be good to cut back, multivitamin only 2 times a week, very lightly on one meal. And I like to alternate the cal. with D3 and the Ca. without, you don't want too much D3 because the uvb helps their body to manufacture it. All dusting should be very light.