My definition of a successful integration is that none get hurt. If none get hurt you are doing great. With differences in ages and especially maturity it is pretty common for the different groups to form sub-flocks and avoid each other. Sometime they will mingle together but the younger avoiding the more mature is really common. A lot of that depends on the individual personality of the chickens involved, especially the older ones. The personality of one individual can affect the entire flock dynamics. That's why no one can give you guarantees about any living animals and their behaviors. Each bird is unique, each flock is unique.
I can't tell how much room you actually have but it looks fairly spacious for them now. They will grow fast and it will get smaller. It sounds like none are really getting injured. In my opinion the younger you can get them together the better.
What are your low temperatures at night. That's what counts toward whether they can stay out there or not. Those daytime temperatures are a totally different issue. If those chicks are at least two weeks old I would not have any problems leaving them out there overnight if the lows got down to the mid 70's, including the Silkies. As long as they don't get wet, like rained on, and they are not in a breeze they can manage.
I can't tell how much room you actually have but it looks fairly spacious for them now. They will grow fast and it will get smaller. It sounds like none are really getting injured. In my opinion the younger you can get them together the better.
What are your low temperatures at night. That's what counts toward whether they can stay out there or not. Those daytime temperatures are a totally different issue. If those chicks are at least two weeks old I would not have any problems leaving them out there overnight if the lows got down to the mid 70's, including the Silkies. As long as they don't get wet, like rained on, and they are not in a breeze they can manage.