question: I am going back to work next month and will have to stop Bf my little girl. She is now 11 weeks old. I need to put her onto formula, and Lactogen was recommended by quite a few people. Will this make her fat or constipated. She really enjoys the BF as do I, but as I teach, I won't be able to continue to feed only two feeds and express. I have loads of milk and have expressed and given her a bottle when I have left her with my mom.