Hello everyone, we're on the 60ml triple comfort formula. We're giving…

Hello everyone, we're on the 60ml triple comfort formula. We're giving her milk because she's lagging behind by 800 grams. She's growing at 62 lbs and weighs 5100. So, our daughter seems to be eating well with milk but not gaining weight (500-600g). Therefore, we connected her to formula. I give her one dose once, then just breastfeed. Before that, there was constipation, they could go up to 7 days without pooping. Now, once a day or every two days once. Yesterday on the second day, she showed, and she was very constipated, the stool is thick and dark