We got Caddis around Christmas 2013 that we were told was a Shepard-collie mix and was originally purchased from a Mennonite farm. She is a very happy dog, she "yips" a lot and does this high pitch scream often but she is able to bark. She is about knee-high. Her tail curls to the left (if you are looking at her from behind). Oh and she is a habs fan. I thought you might have some suggestions to look for. The person that told us about Basenji's thought she might be a mix with a collie.