Does having your baby in the room with you until they are a little older make them happier, is it better for them. ? Stupid question I know but here’s why I ask.

Last night my husband and I were talking about our youngest which is 7 months, he’s been in our room in his own crib since we brought him home and he’s the happiest baby in the world. While our other children slept in their own room since they’ve been lorn and seem to be not so happy, always crying or screaming, throwing tantrums.