Having some trouble

So my 6month old baby just started solids a week and a half ago. She is formula fed now too. We started the transition at the same time.

Ever since though she’s been having really hard poops!! She poops everyday but they are rock solid.

I was told to wait until she is 7 months to introduce water...

All I’ve been feeding her is pears and sweet potatoes and nothing is changing.

Can it be her formula that is making her have these hard poops??

I don’t know what I can do