They are still young so you don't know how it will end, but that sounds similar to @Shadrach experience in Spain. Lots of room where the roosters claimed separate territories and had a very small number of hens like yours. His situation was sustainable, hopefully yours will be too.
How big is that run? It is pretty common for younger birds to avoid older birds until the younger start laying. Then they become one happy flock. Do the two have enough room to stay away? I consider it a success as long as no one gets hurt, the joining will happen later. But it can take a...
Some people cannot. We all have different histories and thought processes. Some people just can't do it. I think it is important to understand if you are one of them.
If you are going to end the life, you have to determine which way you can. You do not want to hesitate, flinch, or close...
What do your facilities look like? How big (in feet or meters) is your coop? How big (in feet or meters) is your run? What does the inside of the coop look like? Photos of your facilities could help.
You are dealing with living animals. I cannot give you any guarantees as to how safe it...
Be patient, give it time. The worst thing you can do is get impatient and do something drastic.
It is your first time incubating. I understand you want every egg to hatch and you are terrified you will do something wrong. I doubt it does any good to tell you to relax a little, a lot of us...
If you have two roosters and 1 hen, they might not fight. If you have 2 roosters and 30 hens they might fight. I do not believe in hen to rooster ratios as far as fighting goes. If you have one rooster and 30 hens some hens may be over-mated or barebacked from mating. If you have 2 roosters...
I think you have a very valid worry. How many do you have and how old are they?
I brood outside. My brooder is big enough I can heat one side with a heat lamp but with good ventilation the far side can cool to ambient temperature. Yours isn't that big and it sounds like ventilation is not...
Some people handle their boys a lot, some turn human aggressive and some don't. Some never handle their boys, some turn human aggressive and some don't. Many are somewhere in between, some turn human aggressive, some don't. Sometimes older hens beat up on the boys, some turn human aggressive...
Why do you want one? What are your goals toward keeping a male? Your goals are what is important to you, not my goals. If you know what you want you have a better chance of getting what you want in the end. This is probably not easy for you to answer yet.
You do not have roosters yet, you...
What are you specifically looking for? Show quality, hatchery quality, or backyard flock eggs? I'll assume you are in the USA. My preference would be somebody I could drive to pick up the eggs as opposed to shipping them, if possible.
That's a good list above. I'd add chatting with your...
I assume the attacks take place outside as well as inside? For four chickens that should be more than enough space. I'd try isolating him for a few days to see how that goes.
This may be your guide as to the best action to take if it doesn't work out.
Trying to figure out how to approach this to help you understand. One morning in Arkansas the temperature was -4 Fahrenheit. 4 degrees below zero. I opened the pop door and let the chickens decide what they wanted to do. They immediately went outside to enjoy the weather. -4 F is a lot...