tucker did the same thing when first got him. of course, in hindsight, the lack of eating could have been a combination of too many treats and a new home. anyway, i found that many of the treats are so big that just one every time he went potty outside would fill him up in no time. so i started breaking them up or cutting them into smaller pieces. he's 5 mos now and weighs 5.5 lbs, but i still only give him the pieces and only for training purposes. a little bit goes a long way.
i hope this helps
