I have a 13 month old son and although rare he does sometimes poop in his fresh diaper within about 5 minutes of changing him.
Do you change your kids diapers if they poop in them right after you've already changed them?
I usually wait for at least 45 minutes before doing another change because he'll need to pee during that time and I don't want to waste an absorbent diaper for just a little poop.