Journalists tried and failed to enter the multi-storey pig buildings so there was no chance of a big bad wolf getting in.
These piglets didn’t need to build something to stop the baddie getting in, it seemed he was already in and very much in charge. It was academic anyway they didn’t have any straw. Not even for bedding or rooting in. Their floor was slatted, so their waste was easily sluiced away.
Time passed and the three little pigs grew and were kept in the dark. I’m not being metaphorical. Not giving them any light made them quieter.