I agree with @damiensmommy2015 that's one of the reason moms think they aren't making enough milk and quit,mine are only hard if I go hours with out nursing as well

just because your boobs are soft doesnt mean your supply is down. just means its regulated. my son is almost six months old and my boobs are only hard when hes gone hours without nursing. as long as baby is having plenty of wet diapers he's getting plenty.

Pump ever 2-3 hours even after you nurse ! Mothers milk tea , fenugreek supplement , blessed thistle and Brewers yeast aslo help to increase milk production and lots of water !