We're at the park just now, and Thistle is shivering anytime she isn't running, and keeps curling up in my lap. She's a full year now, thin but in a healthy way, and has a respectable coat. It's 60 F (18 C) right now, so it's cool, but not cold by any stretch.
I'll try a jacket on her when we get home. I'm just baffled as to why she'd need a coat for this, is she just so acclimated to our hot weather? Has anyone seen a dog this sensitive to cold before?