Hello and thank your for using HCM for your answers!
I will go straight to the point: your husband should change the diet! From your prescription we know that he is taking a fiber supplement and stool softeners, which of course help to ease the situation.
However, your husband should definitively drink more water and include liquid foods in his menu. With liquid foods I mean SOUP and other meals. All kinds of soups and other dishes (meals) will do, obviously containing low amounts of salt. Important is that the food consumed by your husband should contain liquid. If your husband consumes only dry or semi-dry food, then where will the digestive system find the liquids necessary for a smooth stool transition? Liquids and water are necessary not only because they help the food become less consistent but they are also essential for the production of
gastric acid and other enzymes that help food to digest.
Also, please avoid consuming too much sugar, as it boosts
constipation.
In addition, apart from orange juice, your husband should consume fresh fruits, avoiding bananas. Kiwi is great to combat constipation and it tastes good (preferably well-done kiwis, soft ones, not the hard ones). Two-three kiwis each day will do the work.
I think that by these measures, combined with some kind of physical activity (just walking or moving around at home) the stool transition of your husband will improve a lot and the constipation will be very much reduced.
I hope that you will solve your husband's issue and I wish you good luck!