aww, i'm sorry. i know how you feel. although i've only had bux since sunday, we hadn't had one accident yet and he was doing so well....as soon as we'd go outside, he would do his thing, then jump up on my leg to let me know he was ready to go back inside, well, last night my boyfriend is watching him while i was studying, and he took his eye off of him, and there ya have it...he accidentally let out a little poop...i was so upset at my boyfriend and poor bux felt so bad. he tried to hold it.
anyway, don't worry, i'm sure he's not sad, he is just really tired from playing w/ all of his new toys!!
just wanted to know i was in the same boat!!