Join Date: Mar 2014
Location: West Coast
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Look up littermate syndrome.
I would personally never do it unless I was retired and lived on 50 acre fenced farm where I basically just wanted to watch the dogs be dogs day in and day out and didn't have to really worry about training or space. Kind of old school country living, I suppose. I would never have littermates, or two puppies for that matter, living in a home where they had to be trained to be good house pets and neighbors. It would be a huge amount of work and logistically challenging.
If you do get littermates, you'll need to potty train x2, train x2 (separately), socialize x2 (separately), walk x2 (separately), food x2, boarding and/or daycare x2 and pay for vet care x2. And, because you'll have to pay vet bills x2 you'll want to go with a great breeder to try to limit the chances of genetic health issues, but the problem there is that no great breeder will sell you littermates because they know the success rate is low and they would not put their puppies at risk like that.
Why not get one puppy, give him all of your attention, time and effort, and then when he is a well-adjusted adult who doesn't need so much of your attention, get a second puppy? It would be better for the puppies and better for your family in the long run.