Are my two hens happy together?

[Catykin]

Hi!
I only have two hens, both isa browns. but are they happy just the two of them? Or should I add a couple more to the flock? Thanks!

 

[Alley]

I had Betsy and Diva for a year. This spring I brought in Ethel and Lucy and now all hell has broken out. It's a fight up in the hen house every night! I think they were happier when it was just the two of them. LOL