I have just read the book cover to cover. Thanks so much for such an insightful and informative read. My baby boy, too, wasn't gaining the weight he needed so I switched to exclusively pumping - as a new mom, I didn't know about exclusive pumping until I came across your blog (I initially thought I was the only one and was worried I might be hurting myself or the baby by doing so!) This guidance has given me several great strategies going forward.