Oh dear, you are in a predicament. You have a group of birds that are not likely to create a good flock, and will probably have a great deal of strife if you do not use some animal husbandry strategies. Chickens are not like puppies and you have to be selective to as which birds your put together, or it can get VERY UGLY.
I think that you are beginning to come out of the darling stage with your cockerel chicks. This happens, cockerels tend to be very brave, and often approach people in what seems like a very friendly manner, but is actually the first signs that they have no fear (which seems like a good idea, but isn't in chickens) and translates to they do not have any respect for people.
This 'friendliness' tends to make people love them, and be horrified at the idea of culling them. They are a lot of fun in the darling stage. But around 12-16 weeks, the hormones begin to hit hard, and this changes the bird. It is not the bird that you had just a few days ago. I think that this is where you are, because all of a sudden you must be seeing possible problems, and would like to prevent that. That is the problem.
Being raised together has no influence at all with cockerels. The more cockerels that you have, the greater the chance of it not working out. Young cockerels in a flock of just flock mates cause a lot of problems and strife. They are ready to breed 4-8 WEEKS before the pullets are.
They BOTH need to be separated from the pullets. They are bigger than the pullets, and without older hens to knock some manners into them, they just become bullies. Sometimes they can wear pullets out, literally killing them, keeping them from enough water and food. If your pullets are hiding, loosing feathers, running constantly, do at least remove your cockerels from them ASAP.
Secondly they can attack each other. Sometimes this is a once and done, sometimes they will fight to the death, and a lot of time this is a constantly ongoing thing with battles daily. Again being raised together has no influence on this. This cause a lot of strife in the flock, and is upsetting to your other birds.
Thirdly - they can attack people. Inexperienced people vastly underestimate the violence of a rooster attack. If you have children under the age of 6, I strongly recommend removing them from your flock. They tend to attack children first, and small children at the face and head level. Then they will take on women, and eventually even men. They will scratch, bite, and flog. They can knock a child down. At best it is unpleasant, at worst it can leave scars, and ruin this hobby forever.
Your older birds will be aggressive to your chicks. They too may be aggressive enough to kill them. You can integrate them into the flock, around 4 weeks, but you need a lot of space, and you need a safety zone in which the bigger birds cannot follow them. The meat bird will not do anything to protect them.
Do make some changes to the flock. They really are not like puppies and kittens where being raised together tend to work it out. I can see from your remark on the meat birds, that you probably do not want to cull and eat the birds, however, you really do need to either set up a way to separate the boys and girls for at least 2 months. And make a plan on how to either give away the cockerels or dispatch them if needed. Realistically, there is a very large chance that neither cockerel will be a pet like bird, many attack people. Getting a plan on how you will manage that now will be of help.
Mrs K