Hi - 3.5yo has been withholding since about 1, due to a bad bout of constipation. Managed with movicol well until toilet training. Manages 1-2 soft type 4 poos a day on the toilet with lots of encouragement. Has started with senna due to starting to withhold again when training. Now on 4ml senna and has urgency to poo and will say she needs a poo but can’t hold it until she gets to a toilet resulting in soft poo in knickers but not runny. Is this likely that the senna dose is too high for her?