Put golf balls in the nests for egg eaters.
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x2No wonder you're worn out and Goldie is a nervous wreck! Just when Goldie is getting a handle on her new flock members, you jump in and change things on her, including her nest!
If you were to back away and do nothing at all but just watch them from a distance, you would probably see this happening:
One of the two new hens will sidle up to Goldie and stand there staring at her. This is a challenge. If the new hen doesn't look away and move on, it's a signal to Goldie, she wants to challenge her. For the dominant hen to become such a "bully" all of a sudden, it almost always means some outsider, young upstart is challenging her status. What appears to you to be Goldie bullying is almost surely simply her defending her role as flock leader.
Usually, when you are introducing just a couple of new hens into a tiny flock, they manage to sort out the pecking order very quickly. But if you interfere with them, it can take much longer, and you end up not really helping matters.
Try backing off. Put them all out to free range and let them spend as much time together in a large space as possible, all afternoon until dark, if you can. Try not to interfere when it's time for them to go into roost. Try to let them do it their way, even if there's conflict.
If it looks like they can't settle in without a knock down/drag out fight, try getting the two newcomers aside and wait until dark, then put them in the coop on the perch. Next morning, leave them alone to sort things out. Chances are they will have it all resolved before you even come out.
As for the egg-eating, try to ignore that problem for now. Chances are it will resolve itself, too, once Goldie gets her flock in line and she can lay in her old nest again.
If your run is as small as what is on the coop you showed us, that might be your biggest problem. That is very tiny! If they are so close to each other, it is no wonder she picks on them. Proper integration takes space. The chickens crapping in the yard will likely do your children no harm, unless you manage poorly and in turn have disease.