Have you had issues with Pals starving themselves or getting clipped into things? If not how high is each storey and how do you have the stairs set up.
The floors are three high, which is acceptable for even the biggest Pals. The stairs started at one wide, with one at the edge of the next floor, and I had to change to two wide stairs with at least two at the landing. Nothing has gotten stuck since I made that change, though sometimes the spin around after going up a floor for a while before they figure out where they're going.
Agree about doors (the only ones are on the first floor, and they're kept shut except when I go through them), the edges of this go clear to the edge and they haven't fallen into the water yet.