i'm having the exact same problem with my son with the constipation and i have to give him prune baby food for him to poop too, i also give water but my mom told me if he doesn't drink it , to add a little sugar in it and shake it up cuz it will change the bland flavor and make it sweet and it worked and my son drinks it lol i put like a few pinches in a 2/3 oz of water

I'm trying all different kinds of food on him. Sweet potatoes, carrots, green beans, pears. Right now I'm Giving him water in the same bottles I use for milk

What solids are you giving him? Maybe try switching him to something different. Also apple juice is a great laxative ...
Have you tried switching the type of nipple he uses ....I first used a certain type of sippy cup my son didnt like it and couldnt get anything through the spout . I EVEN TRIED AND IT WAS DIFFICULT FOR ME 😮😮i switched him to a Tommie brand cup and it comes with two types of nipples one that looks like a bottle which helped him become familar with it & another one that I'm gonna transition him to this week which is still soft but is the shape of the traditional sippy spout

@momofdeuce I'm trying to get him to drink at least an oz or two every time I feed him solids because he gets constipated every couple days the only thing that has helped that so far is giving him prunes every few days but then the prunes clean him out then he gets constipated again right after

I just give it to him & as I'm holding it I tell him to hold it as I put his hand in the holding position. He's now holding his bottle like a pro.. He's still working on his sippy cup though.. But I read one poster tell a mom don't force it just encourage it. If he doesn't want it just let him be but continue to give it to him daily kids mind change by the day .

Also my son began drinking water from my bottle & now when I put it in his cup he's already familiar with it ...I tried putting it in his bottle but he just played with it I guess because he's used to drinking milk from the bottle