Not so much unreasonable as unsure! My 8 week old is starting to be really fussy as times but feeding/pooing/winding/growing well. Combination fed but mainly formula as still very hungry after breastfeeding.
we had a dummy (mam) that we got free in a pack and i popped it in to try, and it seemed to really help, but my partner is set against dummy use as is worried about teeth development etc etc
aibu - avoid dummies
ainbu - most babies use a dummy