So I'd say definitely over 50% of the time, probably closer to 75%, when my babies age up to toddlers, they're fat (like in the top third part of the weight scale somewhere). Their moms are always on ...
I don't feed the babies every 4 hours. Maybe 3 times within 24 hrs. When they cry sometimes they need a diaper change or attention so I have my sims cuddle or rock them.