Any parents on Southperry? Guessing .. no

I mean his wife might not have milk when the baby is hungry, the milk doesn't come on demand/there might not be enough. So sometimes you have to use formula.

alternatively, his wife could use a breast pump to pump extra milk out of her boobies when the baby isn't hungry and then they can have it on hand. Same thing as bottle feeding, but with breastmilk instead of formula.