Is this something you can live with?
2) Do you have another dog? If so, is it a male or a female? Is it larger than the Shiba will be when it is full grown?
Shiba Inus are same sex aggresive. A male shiba will not let another male be the dominant dog. Usually a larger breed of dog will be respected and fights should not occur, but this is never a guarentee. The same with the female. Any dog, male or female, smaller than a shiba will be dominated and bullied. Spaying/Nuetering helps with this but it is not a quarenteed fix. A chihuahua and a shiba don't mix!