Trixie says, “Can I help?”
You can sort of see how she looks like two dogs glued together. The front half of her coat is longer, gray and wirey while the back half is shorter, darker and smooth. You can see the longer mohawk-type hair on her head (right down the center) in the picture above.
Trixie likes to be in the room with you all the time, but Gus only usually stays around when he thinks a treat is imminent.