Grits! You're my heroine! That worked perfectly. Sure enough the bear and sabre cat races have that box set so they can go through doors. My interest is in the fox race more than the dog and wolf races. Sure enough the fox race had the box set to preclude going through doors So I changed it for the fox race, tested it in game, and Buffy's little fox now follows her perfectly through doors!
We've been debating between sabre cats, bears and foxes. This is just our observations purely from a perspective of what best suits Buffy -
Sabre cats are too unreliable for Buffy. She's been hammered too many times while the cat is just deciding whether to get up from his nap or not. And he gets in the way of her bow by jumping up unpredictably.
Bears are actually quite reliable. Even though they sleep alot, they get up quickly to follow and stay close. They are big and can get in the way though requiring quite a bit of caution with Buffy's bow. They're also noisy, but we use a mod to dramatically lower the roaring and grunting volume of follower bears.
Foxes are incredibly attentive and reliable. They remind us of a clannfear in that they are reliable foe-seeking missiles. They rapidly inject themselves between Buffy and a foe and do a great job of keeping he foe occupied. They're small and stay low so shooting over them is easy. The fact that they do poor damage is actually good for Buffy and helps define their roles. The fox pins/distracts the foe in place so Buffy can do the killing. We've found that it makes for a superb team. Using the 'familiar visuals' like you helped me achieve simulates a magic shielding aura to account for the fact that our foxes take little damage (while also dealing out little damage). The biggest downside was that they couldn't follow through doors. Now they can! Another consideration is (as ever), Superian. A fox doesn't scare the other horses when Buffy pulls into a stable.
Another Superian consideration is that Buffy's critters are 'summoned' and 'unsummoned' by equipping and unequipping a ring - the primary benefit of that is that they can be 'summoned' from the saddle.
Anyway, thanks so much again for finding that gem of a tweak in the CK and posting it!