Make pen markers double as hitching posts.

[Locklear]

If a pen marker is not fenced in, it should work as a hitching post. Pawns will tether the animals to it like they do when packing a caravan.

This would make caravanning with animals much better. Right now animals just stand at the edge of the map, holding all the supplies, so you have to run back and forth carrying stuff 1 at a time, unless you build a whole pen for them. If you settle a second colony for a temporary hunting/mining outpost, animals wander off almost immediately.

If pen markers worked like hitching posts, you could just bring one with you, put it down where you want it, and all your animals can just be tied to it.