
Advice and opinions on the much appreciated.
We have a 6 month old male Golden Retriever. He is our second Golden and so we are not at all new to this dog owning. He has been a very good puppy and is very placid and laid back although it is being apparent that his mascluine side is coming out and he's trying to be a bit bossy on times! In th future (?near or distant?) we would like to get a second dog to keep our Golden company and also two dogs look good fun together. We have considered getting a second Golden as they are great dogs BUT I absolutely adore Border Collies.

I am very much aware of the challenge that BCs can often be and also of their demand for mental and physical exercise. I would be very interested in trying out agility when the dogs age would be right as it looks so much fun!! I know that I could try this with my Golden but he's quite chunky (big boned, NOT fat), and I don't feel I want to have him doing the jumps and putting extra stresses on his joints.
To make things more complicated we have three young children aged 6, 4 and 20 months. I work three afternoons a week and so the dog would be alone for 4 1/2 hours on these days. Our Golden has taken well to the children and our working patterns without major problems although I know that all dogs are different.
The advice I am looking to gain is what are the opinons of a good age to introduce a second dog? Also, would you suggest a dog or a bitch? I had mostly thought towards another dog but I don't want the new dog to be viewed as competition. Also, are there any opinions of BC ownershipn that would put me in better stead with the breeders? If we are still set on a BC, then all I need to do is inspire confidence in a good breeder as many of the best ones can afford to be very picky about puppy owners.

I look forward to the replies.