See the Hallie blog for the gallery of all 3 litters.
As these are the youngest, you figure they would be slightly lagging behind but they are not. I also find that Hallie pups are plumper but they are older. In reality the litter is closer to size with each other than we have ever had. Some will be smaller - some larger - none oversized.
The pups adjusted with actually no adjustment to each other. They never gravitated to their siblings. They just played with each other. Can't get better than that.
In reality these litters will think of themselves as siblings. You may not but they will. They will be forever bonded. Mother's will also recognize and get excited to see them again if they visit. This trumps them staying separate. It helps them develop nicely teaching them how to get along and how to deal with a crowd. They do get along and it was such a natural transition. They are wonderful pups - each one.
What has changed for us is the twice upstairs play. The food. The laundry - oh my the laundry. We had waterproof pads around the puppy pads and out that went. They walked off their blankets and peed on the waterproof pads. So, instead I placed the paper dog pads under jutting out so they now walk over and use them. It wastes so many pads and reduces laundry but as they get better and better, I will push them under the other pads till they only go where they are supposed to. Some already do. Some get up and go a short walk and squat. They all do not get up and just pee. They know it is a process of where you are supposed to go. By the time they are great on pads, we will get them used to going outdoors as well. The weather will be good by then. The desired result will be indoor and outdoor trained.