To add on the above question of "what is being fed" can you tell us what was the last meal/s you fed and the quantity fed
After answering the above questions some suggestions you can try.......
Some mineral oil via syringe orally (A few drops only) you can also mix the oil with some vegetable puree
Canned pumpkin, mushed up also has a good result
If you cant find canned pumpkin try a fresh pumpkin, cook it ans mash it and feed that
Of all the above the pumpkin worked within 24 hrs for me after mine did not go potty for almost 4 weeks (28 days)
Also keep up with the baths and tummy massages it cant hurt