The nice thing about adopting littermates is they are together their entire life, so there is no challenge integrating them. I don’t see any downside to adopting littermates (Until they're not really buddies—sometimes in a litter of three, two will likely be seriously limited plus the third, not a lot). https://kameronmmgxo.isblog.net/the-basic-principles-of-black-maine-coon-kitten-for-adoption-in-the-us-56180363