DS1 is 4 and for the last 6 months maybe has been regularly pooing in his pants. He was potty trained at about 2.3 and although poos took a bit longer than wee he got it quite quickly.
He does poo on the toilet too, but we seem to get poos in pants at least every couple of days. He doesn't tell us when he has, and will deny if asked. He also claims he didn't know he needed a poo/didn't know he'd done one in his pants but I'm not sure I believe him.
How should we tackle this? So far we have (mostly) not got cross about it but have helped him clean up and have instigated a toilet routine in the evening, but today and yesterday have both been shitty pants days.