The two things that answer this happen before you look down. Why the size tells you nothing, what to change at the next feed, and the list that ends in a phone call.
Day 3 milk coming in can overshoot into engorgement. Every relief has a dosage: milk to appetite, warmth before feeds, cold between them, and when to call.
The CDC says most US families can use tap water. The NHS says boil it every time. Both are current guidance, and the difference is not what most parents assume.
The CDC says tap water is fine for most babies. What actually changes the bottle is the order you mix it in, the scoop, and knowing which babies need boiled water.
Cluster feeding is feeds bunching up, not supply failing. What the AAP counts as normal, why diapers beat the clock, and how to get through the evening.