I asked because because my first lab was black and he was easier to train and easier going than either of my next two which were yellow. Over 13yrs in the field, the black dog lost 2 birds that I remember and never had a grouchy day. Unfortunately, he had terrible skin allergies. Both my yellows loved to retrieve, but neither seemed to have the nose that my first dog had, and they both could be a bit cranky. My first yellow would, at times growl and snarl at me and he took a decided dislike to one of my nieces and wouldn't let her near him. The dog I lost last winter had unbelievable drive and athleticism, but again, didn't seem to have the nose that my first one did, and as he aged, he also got a little cranky, although one only had to say "knock it off" and he would. In his case, not was clearly him pushing boundaries. I was just wondering if that was something of a common difference, or just my luck. Three dogs over 40yrs. don't make a good sample.