With the death of Rosa and her two friends, we have one chicken remaining. We call her "Sola," which is short for "Solamente."
The odd thing is that she has started crowing like a rooster every morning. She never did this in the past, so it may be connected to grieving or her new aloneness. However, it is so exactly like a rooster crow - and not some hen cackle - that we have decided she may be a transgender chicken.
Until I know what her rights are, I will keep removing the eggs from her nest so that she doesn't get embarrassed.