When you have a lot of pups competing for the milkbar, you start to see personalities unfold. We have 2 that want ALL the milkbars till the milk arrives and then they settle in but until then, they are hunting and trying to take over spots. It is also interesting to see who won't allow such things to occur and those that will.
This is how they learn - interacting with each other. They actually have a benefit even though you may not think so. They learn how to manuever a variety of personalities. When all 3 litters are together, they will as well. This crew will have a headstart.
There is nothing like a large litter to help the complacent, the more determined along its way. Personalities are core but they unfold with experiences. They perfect their skills and become more than they were the day before. It is one of the most exciting times when they are placed together. What you see at 6 weeks will change at 8 weeks.
It is going to be fun watching the crew of 12 as one.