This is tragic in a way, until you realize that people who dress their animals up for Halloween are really taking back the control that is lost on the other 364 days per year.
On all those other days, it's the animals that make the rules: they choose where to poop, pee, sleep, when to eat, where to lay, etc. And we all dutifully pick it all up, clean up after them, while they stare at us, as if to say, "yeah, pick that POOP up, beeyotch."
So, then on the one day of the year, it's the humans who make the rules. We dress them up and look at them as if to say, "Yeah, wear THAT to the party, beeyotch."
You go, girl.