Poop problems

Hi ladies,

My 6 month old started having some solids, and also started being supplemented with formula. Since those changes, she’s having issues pooping. She still poops, but they are super hard, sticky, and I can tell she tries really hard to pass stools. She eats prunes but that’s not helping, and I bought some prune extract drops but she hates the taste and refuses it. Anything else I can do?