the one where i lose all credibility

i work in a building that allows their tenants to bring their pets to the office.
my boss, Dr J, has taken full advantage of this allowance & brings her heeler, P, along anytime she's here. (yes, i am writing from work. feel free to talk about how i'm wasting my boss' time and money. except, this is lunch. yes, i take it that late. enough) everyone in our building knows P and most everyone loves her. a few doors down there's a woman who occasionally totes in a small rat like creature (i think its a dog). around the corner in the other direction we've got another woman who often brings her two dogs in. and so on.
this brings us to today, which found me at my desk contentedly eating my lunch, when a woman i'd never seen before walked in and started rambling about something to do with P. it took me awhile to figure out what she was trying to get at, "i'm just wanting to let you know that there's dog poop outside your door and i like P so i didn't want someone else to find it, tell management and get you in trouble"
get us in trouble?
P's been inside our office this whole time.
i mean sure, there could be magical fairies letting her out to do all the awful things she wouldn't do if we were watching. maybe she's just THAT vindictive, just so upset that Dr J left her with us that she had to GET US IN TROUBLE.
i suddenly heard myself responding and realized i was just being a snot-faced twit. so i said i'd clean it up and reached for the tissue. as i headed for the door she mumbled something about her ability to clean it up as well but the fact that she JUST WANTED US TO KNOW. fine, but i was ready to clean the mess.
now what i saw when i looked down the hallway was not at all what i envisioned. rather than finding a heeler sized turd, i was pointed to a small chihuahua sized one.

i said nothing.

just thank the lady for letting us know.
but to myself in my little mind, I RANTED.
how anyone could think those came from P is beyond me.
pft. i wish it were true seeing as i have to take her out quite often when nature calls.
whatever.
what really got me was that (unless i'm wrong and P really is out to get us all) the keeper of whatever animal it was that actually relieved itself there felt it was fine to just walk away and pretend it hadn't happened.
GAH!
now i understand just how unsavory a task it is to have to clean up after your dog and were it outside, at the park, EVEN ON MY LAWN i would probably be ok knowing that you just left it there. heck, i leave it there ( though not on the neighbor's lawn. just so you know).
BUT INDOORS? REALLY?
GAH!

perhaps i've misjudged the situation.
perhaps i am the one at fault.
perhaps P got out for a minute.
perhaps i am to blame.

GAH!