Be sure to get doccusate sodium, colace stool softener. Dulcolax is only a brand name and usually it is a laxative. They also make a stool softener, but some have made the mistake of using a harsh laxative. Look for generic Colase or stool softener.
I forgot to mention that the best time to...
Sorry about your hen. You said that you felt grit in her crop, but that could be chicken feed or seeds as well. Do you have granite poultry grit available for your chickens? They don’t eat much of it, but need it when they don’t find enough small rocks in the ground to help the gizzard work...