We're also having a "poop issue" with our 18 week old Yorkie. We just received him a few days ago. His poop schedule is 2:30am and another random time during the afternoon (anywhere from noon 'til 5). He never poops after eating ... actually he isn't eating too well. He nibbles. The vet said that his anxiety should wear off in a week. It frustrating trying to get him to eat and then poop ... as opposed to eat, play, sleep, sulk, play, poop.