Yes, dogs need sweaters and blankets once the weather starts turning cold specially if your dog has short hair, she is a puppy or senior, and also if she is recuperating from injury/illness.
Abby and Charlie both wear a sweater and sometimes jacket when we go out, they both have short hair, and a sweater or t-shirt when they are indoors. By the way, and this may just be me, but I like to touch their ears. If their ears are cold, then they are cold.
Sweaters and jackets for dogs, if you are looking for quality items, tend to be a bit expensive, but I’ve learned from trial and error that they are worth it. Blankets, on the other hand, I get them from a thrift shop. They have inexpensive, beautiful thick blankets in all sizes and colors.
Take a walk with your canine companion, weather permitting, but remember to bundle up and do the same for your canine companions. Enjoy your weekend.