My middle son, just turned age 3, has been potty trained since before age 2 successfully. However, in the last few weeks he has started pooping his pants again almost daily. We have a 5 month old baby and assume this is related. We thought the pooping might have been caused at first from being sick/having a cold (it has seemed previously that excessive mucus caused looser bowels), but it has continued. Sometimes it seems like an accident, other times it is obvious he is being deliberate. Please advise on how to handle this.