They could definitely be in mourning. I had a flock of 12 hens and a roo that I got from someone, and added to my existing flock. All "his" girls stayed with him, even though my 2 other roos were trying their hardest to woo them away. One morning, I found him drowned in the horse trough!
He was an awesome roo and his girls adored him. They mourned for over a week, and then gradually split apart into groups with my other roos. A few never chose a roo, and stick to themselves.
Are they still in mourning? No idea. Maybe they just don't like my roos, maybe they still miss Mister. There's no way to know. I do know that they were really lost for several days without someone to show them where all the good treats were and where to take their dust baths. They followed me for a while, then decided I wasn't quite the rooster for them! LOL!
I'd go ahead and add one and see if they take to him.
Sorry for your loss! I've always heard to have at least 2 roos, so you have a back-up in case something like this happens. You can't always do that, but it worked for me.
Shelly
