Very nice Easter Eggers, you should be getting a nice variety of egg colors.
Chickens in general tend to be mean to new birds added to a flock as they get the pecking order straightened out, there is a nice article in the Learning Center that might give you some ideas on how to let them get to know each other first to make it easier to add them next time https://www.backyardchickens.com/a/adding-to-your-flock
These are Easter Eggers? The guy said they are Ameraucana, what is the difference?
https://www.backyardchickens.com/t/128806/differences-ee-ameraucana-araucana-pls-post-pics/0_20 This is a nice thread detailing the differences between them. Basically Ameraucana are a breed that has strict written standards, dealing with their color and their physical description etc that the birds have to match to be considered as the breed.
Easter Eggers are birds that do not meet the standards and/or are mixes with usually Ameraucana or Araucana in their ancestry (to give them the blue/green egg gene so they lay colored eggs). As mentioned, a lot of commercial hatcheries and feed stores etc will sell the EEs incorrectly as Ameraucana/Araucana… if you are looking mostly just for colored eggs, they are an absolutely wonderful choice for a laying flock.