Originally Posted by tellmeaboutit
I'm really not into purebreds due to the high strung nature of purebreds I had growing up.
This is a myth OP, for every loopy purebred dog, there's a loopy Heinz 57. And for every chilled out purebred, there's a chilled out Heinz 57.
Another myth is that crossbreeds are healthier. Whilst real mongrels, with a fine mix of different genes, may enjoy better health than purebreds, crossbreeds (a crossing of two purebreds or early-generation crossbreeds) are just as prone to hereditary problems as their parents were.
Also, if you cross a low-shed breed with a shedding breed, you stand a high chance of some of the offspring being shedders. So, a cross between a Cavalier (high shed) and a Bichon (low-shed) may well shed fairly copiously. But you won't know this until after the pup had developed its adult coat at 6+months of age.
+1 on not getting two pups together, especially two littermates (particularly same-sex littermates). It is harder to train two, they do indeed tend to bond more with each other than with you, and there is a pretty substantial chance that once they become sexually mature, their relationship will change for the worse. When two littermates decide to fall out, it tends to be very serious.