Two Dogs Kept Together
If you intend to keep more than one dog in your house, the situation is somewhat different. Two animals of opposite sexes will tend to live more easily together than two of the same, other than when the bitch comes into season.
Two dogs kept together will tend to sort out their dominance once and for all, but two entire bitches are quite likely never to sort out their arguments, with problems tending to arise whenever one of them is coming into season.
Once you start to keep larger numbers you are likely to come across dominance problems that will have to be sorted out. Neutering has some effect on the control of dominance problems but should not be looked upon as the complete answer.