Inspired by this thread, I'm going even more all-out with my familiar RP in the new honour mode run I've started (I'm pausing my other one as I want to use my dwarven monk to try to get the punch-drunk achievement, and as I'm lucky enough to be playing the patch 7 beta I don't think I'll be able to get achievements until that rejoins the main release branch).
My new character is a very elfy elf divination wizard/cleric of Mystra, and her familiar is a fey spirit that takes the form of a cat and is called Chakla (a bit of googling for spirit cats told me that a cha kla is a Thai ghost that appears as a cat, and was believed to be used by sorcerors to attack their enemies).
And I'm very happy as I've just found that, contrary to what I said above, Chakla can indeed interact with burrow holes to scout out hard to reach areas! I'm not sure if that was a change in a previous patch that I missed because I'd stopped trying, or a new patch 7 feature. Either way ... yaayyy
