@Barklessdog:
There are many places here that make puppy sweaters.
http://www.drsfostersmith.com/product/prod_display.cfm?c=3307+1298+18054&pcatid=18054
As with most basenjis they will only go out in bad weather if you go with them.
You can always just carry her out with yourself in bad weather- our breeder did that with all her dogs, both puppies & adults- she was in charge not the dogs!
Luckily we live in Florida so we don't see too much cold weather. However, in the AM it can sometimes be a bit chilly so I have to pick up Dallas & carry him to his potty place of he will not step on the grass, same for when it's wet from rain/sprinklers. You are bigger than he/she is so be the boss & just move them. They'll learn!
Oh & I looked at that website & am in love with the argyle coats. I think I am just going to have to get it…although in Florida it might be a bit of a waste of money? :p