Well as far as i am concerned there is no difference with colour,in fact there is a fantastic 5mth old black male labrador pup being walked by one of my friends,and to be honest he is just amazing for his age,he is such a little sweety pie and so so willing to learn.
I have only walked yellow bitches,the 1st pup Heather was a dream,the girl i have now is a live wire she is 9mths,she wants to be on the go 24/7 and hardly sleeps,don't get me wrong she is so good at all that she has been taught and learns very fast,but is a lot harder work than the last one.
So as far as i am concerned its all to do with the breeding.
As far as dare i say humping she is was awful,teddies other dogs heads,thank goodness she is loads better now(doggie hormones).
I had a chocolate dog boarder staying with us for a week and he was so layed back and what a big softy.He was from working lines.....
So breeding for me not colour that makes so much of a difference,
Male or female again depends how you train them and again where you get them
