The last two labs Ive had have been a bust. One was secretly half pit bull and is quite dangerous. The other one, I dont even know what was wrong with her. If there is such a thing as dog autism she probably had that. If I ever did get a purebred again it would have to be something small enough to be safely controlled if it decides that it suddenly needs to kill everyone in the room or run in circles around the living room and scream for half an hour. Ive never had a mutt with a serious behavior problem in my life.