Our girl/boy twins are a little over a year old. One of the surprising things we've learned is that they are intensely jealous of each other at feeding time. It starts first thing in the morning: whichever twin thinks the other is going mommy first starts putting up a fuss. By contrast, they stay fairly relaxed after naps which aren't usually followed by feeding. When my wife breastfeeds both at the same time, they slap each other's hands and face.
Now that they are into solid food, they are intensely frustrated if it takes any amount of time to prepare their meal. Our older son never got as impatient as these two are nearly every day. Not even dividing the job between my wife and I works if each can see the other. We use the alternating spoonful method and the moment one twin finishes a bite, he or she will immediately start begging for more.
I wouldn't bother too much if it were just a matter of the crying. But the jealousy seems to feed on itself. From the perspective of the twins, crying seems to work. How can we break out of the cycle?