Re: Start solids/cereal at 4 months?
I would not start solids for a breastfed baby at 4 months. Is your daughter screaming at daycare, starving? Or are they just looking at a number they should be fulfilling, comparing her to others? Many breastfed babies reverse cycle, eating more at night with mama and less from a bottle during the day. As long as she is happy and gaining weight, it doesn't sound like there is a problem to solve.
On a side note, it's my experience that daycare workers should not be giving parenting advice. Just my opinion though.
If you obey all the rules, you miss all the fun. - Katharine Hepburn