I think it can depend on when you want a poop! Are you planning on putting the food down and then going to work?
If so then you might find something waiting for you when you get in, at that age there digsteive system isn't mature, when mine was that age it seemed to be a chain reaction, he ate then pooped almost instantly. We feed then walk so that he has a walk straight before we go to work, I think that helps him settle too.