DS1 (3.2) has been in pants for two weeks. Wees no problem at all (got the idea on day one), poos took three days but fine since then. Except that today he has pooed in his pants once, on the floor once and in the potty not at all. No warning of either accident, just did it then told me he'd pooed.
Is this part of the normal pattern of training? And how best to handle it?