I know I asked this as a follow-up in my post from yesterday, but I'm starting a new post hoping to get some quick answers! Last night was our first night of ST and DS woke and cried straight for 2.25 hours. We did the checks and everything. Finally we were worried about him dehydrating, so I nursed him. How long is too long to let the baby CIO? I can't find anything online or in Ferber's book. 3 hours ... 4 hours ... more?