How do I alter the footprint of an object for interacting?

This is just off the top of my head, okay? Not really a fix; just passing along some info since it always help to understand game mechanics. Meshes will usually have something called "collision." The reason meshes have this is to prevent your character from doing what the animals can do: pass through an object like the animals are ghosts. The bounding box is involved with this. There is also a sim's routing to consider, which is why there is only one place on a mesh where a sim can enter and exit. A footprint dictates the space a mesh takes up in the game. I believe the footprint resource can also influence whether an object takes up floor space or table space, or even wall space. Removing the footprint would make your object unusable, so don't remove it. I would assume that editing the routing is what you need to do, but I don't know how to do that. Sorry about that. Regardless, if you have an idea of what needs to be done, at least you know what to Google, right?