I'm not sure I understand what a blanket is. Is it like a horse blanket?
In my experience, trying to find a coat that fits a dachshund is a hard task. I'm actually going to have one custom made for Arelus, since most coats are either too tight around his chest or not long enough to cover his body. I found a lady that's relatively close to me that makes custom coats for dogs - not just winter ones, but rain slickers too