Oh my gosh, that has to be the most beautiful, heartfelt thing I have ever read! Thank you so much! Our DD's are 8 years apart and we CONSTANTLY deal with this: critizing, belittling, the "she always gets her way". My girls are adopted and DD5 has to deal with a crappy birthfather (long story) and DD13 has different BParents. Alot of time we cut DD5 some slack, but it's really not fairI know, bad mom!
I will copy this and also pass it on to everyone I know. Siblings will fight but so far our response is (to the 13DD - "how old are you and how old is your sister?" Yeah, that goes over well!
Thanks! I have about a million flaws as a parent, but I'll have to say that was one of my finest moments!!!!! It did really seem to make my older DD understand. And honestly, my girls weren't having the kinds of really intense issues the OP seems to - just the normal sibling stuff. But it got on my nerves!!! Also, in the OP's defense, hers are closer together and that seems to make a difference. My oldest had already moved into and out of each stage before her younger sister ever got to it, so there was less to argue about since they had completely different interests and younger DD wasn't ready for some of older sister's more mature things and activities.
I'll have to say, if you can make your children understand, the payoff is so enormous. We have been waiting for DD19 to get home, and last night when she came in the door and I saw them hug each other and listened to them make plans for the night (which included several rounds of the new Disney Scene It 2nd edition, and then a sing-off using the SingStar they got for Christmas last year) I felt really great!!!
I know, bad mom!

I expect them to treat each other decently while they're growing up, but otherwise I have no expectations. If I have more than 1 kid, it's because I wanted more than 1 kid and not because I wanted a sibling for my first kid, KWIM?
my ds6 and dd8 fight like cats and dogs, then get along great the next minute, but at times I feel like the fighting is way more than in other households. I read the 'siblings without rivalry' book... while i somewhat liked it and do use some of the ideas, my kids still fight horribly at times. Glad you started this thread and i'll be reading for more ideas! I like the idea of them doing things for each other and us writing it down. I just asked my kids as i was reading this if they 'loved' each other... dd said yes but i think she thought she had to or just should say that, and ds was honest and said 'only sort of... because she always makes mean faces at me and she's mrs. prom queen and so mean to me and makes me cry!' We all talked about this for a few minutes, and I'm going to remember to periodically talk to them each about this. Of course, right now they're sitting on the couch next to each other watching tv together.