I know nothing about formula as I had planned to breastfeed and pump. However, my LO won't take breast milk from a bottle but seems to be fine taking formula so when we need to use a bottle (like when I have my doctor's appointments), that's probably the route we're going to go. I do have some questions though.

What are pros and cons of powdered formula and concentrated liquid formula? What do I need to look for if my LO seems to slightly intolerant to dairy? I can have some dairy in my diet but I tried to drink a milkshake once and she got very sick (this was how we found out she didn't like dairy). I don't even know what brands are good (I know all babies are different). Anything else I need to know?