Hi, I have had a sim prob with labradoodles. They guy had a bitch first, then bought a dog to breed. Ha, hasn't realised about F1 hybrids! They used to bark all of the time, but now bark rarely. One will egg the other on, even if the first was taught not to bark. There are many remedies, depending on the dogs and the owner. Have you pointed out to the owner that this is disturbing your peace, (and possibly causing your dog to bark back?) If you are friendly with your neighbour, you may be able to sort a remedy with him/her. If a new neighbour, as you say, try to get friendly first, before you complain. There is nothing worse than enmity between neighbours. See if you can go walks together with all of the dogs, so they get to know each other, and so do you people. Then bring up the problem barking with them. They mey be so used to it that they don't hear it anymore, or it annoys them so much that they repeatedly tell the dogs off without really addressing the prob. The latter sounds most likely, as if the dogs baark for attention, they are getting it, even if only to be told off. As a responsible dog owner, you know this. There are many reasons to get the owners onside, but the main one is that you need them to let YOU discipline their dogs when they are away (if they leave them outside), and you all need to decide on a resolution that will result in having friendly neighbours. There is nothing worse than bad neighbours, as you have to live with them every single day of your life, unlike family or friends! You CHOOSE friends, you put up with family, but neighbours can really make your life heaven or hell. I've had both types, and diplomacy is (usually) the best answer. You already have dogs in common, even if they are the problem.
It is quite possible that the barking annoys the owners too. Do they shout at the dogs a lot, and is that as annoying as the barking? What do the dogs bark at? Did they have the bitch first? (I'd like to bet they did, as bitches are less territorial, so less likely to guard all perimeters.) Many dogs bark out of boredom, and this can be quite common in playful labs. They are not a 'Guard Dog' as some other breeds, which bark to repel intruders. Are the dogs given toys, chews etc when the owners leave them for work etc? Labs are very greedy dogs, with a very strong need to chew. They are also very friendly dogs, very gregarious with humans, and intelligent. Although unaggressive, they need constant stimulation, and without it will develop unwanted behaviours.
Unfortunalely, these days, many people have discovered that dogs can be a 'status symbol', and the price of some dogs has risen sharply. So pet owners have thought that they can 'have a go' at breeding. 'I've got a nice bitch, she's got papers, I won't pay the stud fees so I'll get a dog of my own to breed from her, and maybe charge other people to use the dog'. Thus a 'puppy farm' starts. These people haven't looked into breeding, demand, genetics, etc, or even into the rudimentaries of training thier owwn dogs before they breed puppies. Adult dogs train puppies, just as we train our kids. So if there are bad behaviors there to start, which were taught by humans, they will carry on. But the cycle CAN be broken.
I'm sorry, I went off on a tirade. I am a dog groomer, and see some horrible examples of bad behavior in dogs that could be prevented or cured with a little thought and understanding from the owners. And can give examples of owners who have changed dogs lives and temperaments forever.
I think I should edit this before I click send, as I went off into a tirade about irresonsable dog owners, but the wine kicked in, so I'll send an