I am curious to see how this works out for you, FSD. I meant to respond over the weekend....i would have sent a msg telling parent that dcb needs to come in pullups until he is communicating that he needs to use the washroom. I would say that we have set time when children may use the potty, morning, before lunch, before nap etc. And if child is having BM accidents right after his opportunity to use the washroom then it is not something you are able to accommodate due to the sanitary reasons and your attention needs to be on ALL the children, not taking dcb to the potty every 10-20 minutes.
It should not be YOUR fault if child regresses after being put back in pull-ups. This child is simply NOT ready!