My DS is 3 and is completely pee-trained. He doesn't have accidents and has no problems using public restrooms.

The issue is with the poop. He never has poop accidents in public. He won't poop at daycare. In fact he seems to only poop in his underwear or in a pull up at HOME. He's pooped maybe 2 times on the potty ever. I'm getting so sick of the soiled underwear. Any suggestions? Help! He doesn't seem motivated at all by toy or candy incentives.