I don't like this at all. Mongo is very embarrassed.

When any crawler visits the bathroom, the room adapts itself to serve that visitor. So Donut gets a litterbox. Carl gets a toilet and maybe sometimes a urinal.

Mongo isn't a crawler, so he doesn't get a customized restroom. Actually, what kind of restroom does a velociraptor need?

Okay, I looked it up. People keep birds as pets and Mongo is sort of similar to a bird. Birds can be trained to use one spot for a bathroom, but they won't bury it and they probably wouldn't like pooping in water.

Where does the dino poop go?

Don't even get me started on Carl's new pet. I don't think it even has that orifice.