Right now, everything is great. The girls are all 1 year apart and they get along beautifully. I have found, when there are problems, it is often when they kids are the same age. Having 2 or 3 girls all being 4 years old, for example. This is especially bad when there is an older sibling they can learn "attitude" from. I have been lucky, over all. Only a couple of really challenging kids, 1 girl and 1 boy.