Helpfully, Sif was actually in the office. She was standing behind the desk, even, though it was obviously the kind of desk that was meant to be sat at -- she appeared to just be glancing at a piece of paper, and therefore it looked like she was on her way out of the office again fairly quickly.
"I'm here," she said, laughing a little. "Dogs are allowed, generally. You're more likely to have a shying dog than a shying horse, though we've got a couple who don't like 'em."