I'm dealing with this with my daughter she is super constipated and can't poop on her own and cries when pushing...this only started when she was fully on cows milk as well. She already is on a high fiber diet since she has always had poop problems and it obviously isn't helping. She has a drs a appt today so hopefully we get some help!

Try to give her foods full of fiber to help it along. I'm starting cows milk next month and worried about the same thing lol

Yeah I did that for the first week.

She has been on just cows milk now for a week. The constipation only started when I stopped the formula completely.

It sounds like she's just getting used to it. Did you do 50/50 with the formula and milk to help?