Rex is 9! He is a rescue that I adopted when he was 2, and shortly after I foster failed a 5 year old hound mix, Trip. I recently did an Embark DNA test, and Rex is pitbull/australian shepherd/ german sheperd mix (?). We all had some training, and both dogs passed their CGCs and became my walking companions and we kept training to a much reduced degree. Lots of bad habits crept in. Last year, Trip passed away, and we both really miss him. Rex, however, loves treats, bonding, pets, and training. At times, I have thought Rex and I would like another dog buddy, but he also seems to enjoy his much increased dedicated attention. So, we are back in training, and he loves it! He is in Urban Manners, trying to learn not to lunge at new humans who might pet him! We love it!