As you can probably guess by the dates above, this has been a very long time coming. Even cleaning the scan in Photoshop took forever to finish because of how badly smudged the drawing had become. I actually had to restore a few details with my tablet.
So these two originate from early concept art made for Who Framed Roger Rabbit, back when there was supposed to be seven weasels as a sly reference to the seven dwarfs. You can probably guess why they ultimately ended up scrapping them- they're both kind of gross when you think about it for more than a second.