Many factors influence behavior, and not all siblings raised together will have this problem, which is called “littermate syndrome.” In other words, it's a risk, not an inevitable conclusion. That said, many behaviorists, trainers, breeders, and dog shelters actually discourage sibling adoption. Your puppies will learn their names faster if you use their names every time you interact with them. In the beginning, names should always be spoken in a happy tone of voice in a rewarding context, such as when praising, giving meals, or teaching commands that are rewarded with praise, caress, or treats.
Shelters also have stories of couples (or one of a couple) who were returned because the adoptive owner feared for the welfare of the sibling who was being bullied. We took them out to the potty separately, tried to feed them separately (the previous owners fed all the puppies from the same bowl, so this has been a bit difficult), and tonight they sleep in separate rooms. When Toast (the mother) tires of her constant annoyances, I let her into the main part of the house, but I still try to stay with him as much as possible so that I can read his signs and get him out on time. The goal is to prevent puppies from developing a counterproductive degree of emotional dependence on each other.
So yeah, now that I think about it, I've had litter mates twice, both of them were raised separately from the start, but they ended up together and I would do it again. Training two puppies at a time while avoiding littermate syndrome It's not impossible to avoid littermate syndrome if both puppies live in the same house, but it's going to be quite difficult as it requires a lot of attention and solutions. I would be very interested to see how the evidence, certainly anecdotal, about the adoption of sibling puppies compares with research on raising human twins, or a greater number of children born together. And my feeling is that those who raise dogs in a large group, especially when focusing on a specific task like hunting or mushing, are likely to want and expect a relationship with their dogs quite different from that of the average pet owner, and are much more tolerant and even appreciative of the dynamics of canine society.
This helps ensure that your puppies don't develop a dependence on each other and gives them the best chance of having a healthy and independent lifestyle. OMG I almost forgot, I also had litter mates before, with my last round of wd I raised one and ended up adopting his brother from a 6′ chain tied to a tree, walked past this dog for 5 years and never knew he was there. I suppose one of the biggest concerns (aside from the risk of preparing for genetic health bombs) that I have about the practice of raising littermates has to do with the commitment to raise puppies in the first place. Two puppies cost more to enroll in puppy class, are less convenient to take a seat, take up more space in the car, have twice the pulling force, etc.
