Thanks everyone! The image in my head was of much more detailed guts, but then I realized that they were just going to get slobbered on, chewed up and spread around, so it was best to not fuss with details.
I was tempted to put monkey thoughts inside the brain (a banana, maybe a fez) and monkey foods in the guts (more bananas, leaves, cheetos), but then realized that was too much effort for this kind of project.
Now I just have to wait for the dog to come back to her dad's house from her mom's house in another state. They share custody, just like me and my ex do with the cats.