My six month old is having formula during the day while I'm at work and since she finally gave in and accepted the bottle I don't think she's slept longer than two hours at the time. I bought Cow and Gate, would it be worth trying a different brand? She's kicking and whinging and a bit possety when she wakes, having previously slept well and never been sick. I don't really have the option to pump at work for various reasons but feed her in the morning and at night and the weekends.