Nipple confusion. Sometimes infants have a hard time going between bottle and breast and form a preference.
I tried to pump and introduce the bottle to my eldest once breastfeeding was successfully established, but by then he didn’t like bottles. I tried just about every bottle/nipple combination, but he wasn’t having it!
With my twins, I was less restricted.
While they were in the NICU, o went to nurse them 3 times a day and the other feedings they got bottle fed by
I had pumped. Once they got home, they easily went between being nursed by me to being bottle fed pumped bm by my husband.