It’s possible but it’s likely not gonna go well and the results won’t be easy.You have too little hens for two males.Soemtiems it’s too late and one will end up dead one day, basing off you only have a few chickens your pen probably isn’t that large, and roosters need a lot of space, that way the subordinates can move out the way easier without getting attacked.I have had Father/son situations go totally left.Before I could even do anything the son was on the floor one morning twitching,so if you do keep two, just be prepared for the things you could wound up dealing with(ended up culling the poor guy).I see younger roosters growing up in the flocks go way smoother,They were also unrelated, however I have had related roosters grow in the same flock and did just fine, and I have had cockerels grow up and try to kill each other the next day.Male poultry can be almost unpredictable sometimes.However over the years I have found small warning signs that allow me to know when things between the boys may begin getting heated.Lots competitive crowing more often, stare downs, and etc.