Oliver is a chichshund, a real designer dog. He is a mix of doxie and chihuahua. Personally I prefer the name of dachuahua. He is a great little guy. Loveable, low maintenance, and loves to run. He is very playful with other dogs. Oliver's rescuer thought he had been abused in the past. He does well with older children. He is somewhat shy around big dogs. He is housetrained. This little guy will win you over..big time.