It's official: Sonia has learned to walk! She walks everywhere unless she needs to get there fast-- then crawling is far more efficient. The cats look a bit alarmed at Sonia's new skill, but I keep telling them not to worry; they will always be able to outrun a human. I don't think they believe me, though!
Sonia tested out her fledgling walking skills when we were at the Morton Arboretum last week: