Constipation?

My poor baby keeps getting super constipated. His doctor recommended prune juice in his bottle, tummy massage, and a warm bath. But the only thing that’s been helping a bit is using those windi things from frida baby. I don’t want to keep using them but they are so far the only thing that works. What has worked for your babies?

Also adding: he’s formula fed, on soy due to a cows milk protein allergy (was on nutramigen but switched to soy per his ped’s recommendation a few weeks ago). He has also started solids, mostly oat cereal, sweet potatoes, and some fruits. Will be 5 months on the 23rd.