If you've cut dairy out, just wanted to make sure you know to also check labels for anything with whey, or casein, or ____caiseinate listed in the ingredients. It's cow's milk protein sensitivity at this age, not lactose (babies produce lots of lactase enzyme). Of course avoid cow's milk, butter, and yogurt. Be careful with margarine's too, a lot of them have cow's milk protein ingredients. If you want to make sure you don't become lactose intolerant due to your own avoidance, be sure to include sheep's milk and goat's milk products in your diet. Also be aware that many babies who are allergic to cow's milk proteins are also allergic to soy. Even if they aren't soy can make babies (and grown-ups!) really gassy. If you've upped intake of soy due to decrease of cow dairy, this could be your gas source!
Your baby's poops sound perfect! Grunting, even with the loose/liquid breastmilk poops is perfectly normal. ENJOY! Hang in there!