It might seem silly, but it’s definitely practical. Just because you want to keep her warm doesn’t mean you have to get the jacket with the pom poms and frills, though. If you don’t like dressing her up, just go for the core basics – something cozy to keep her warm and healthy!
My pit is still building up to an ideal body condition, so she still gets cold easily. I went ahead and crocheted her a sweater to keep some of that body warmth in when we go out on cold days. She doesn’t even notice it when she’s wearing it, but it does seem to help! I do think it makes people a little more comfortable about them, like ash_page said, too.