I didn't want to further hijack NAUTIQUE's thread, but thought some might be interested in further discussion about the problems in raising two littermates together. I'd never considered it a problem until I saw discussion on a Facebook thread where several experienced dog trainers and professional breeders weighed in saying it was a really bad idea.
I've linked an article below, but a web search for "littermate syndrome" yields many others.
Some of the problems cited are - bonding more strongly to each other than to humans, severe anxiety and destructive behavior when separated, development of aggression and hostility, inability to develop individual personalities.
I had heard about the bonding more to each other, but that has not been a problem with my girls. They find us much more fascinating than each other. In fact, we often tell them, "play with each other! That's why we got two of you!" They are upset when separated, but not destructive. And they get along very well. I don't think either of them have any real dominance issues. Angel makes a show of it, but Cassie rarely challenges her (she usually is patient and outsmarts her a minute later).
That said, I think if we'd brought sister #3 home... things would be much different. I could definitely tell she was pushy and in charge, even at 8 weeks.
By comparison, Lisa and Rafi adopted 3 pups from the same litter, and things did not go as smoothly. Maybe it just has something to do with the dogs' relationship to each other. P'Nut and Pepsi seem to do fine together.
The articles also mention that this may happen with any two dogs who were together from puppyhood (even if not related).
I know that most of you would not go to a breeder to get two littermates. But like NAUTIQUE, you might find yourself in a situation where you were considering adopting 2 rescued puppies or 2 dogs who were rescued together (history unknown).
It's certainly something I will think about the next time I adopt. Maybe it is better to get one dog adapted to its new home, then bring in another. Of course, then you face a whole new set of potential issues with making sure those dogs will get along.
I'd be interested in people's thoughts and experiences.
http://blog.betternaturedogtraining....mate-syndrome/