Fighting cockerals!

Unless they have drawn blood leave them to it. (but first day you do this make sure you are there all day) When you remove them make sure they can see each other. 

I have two cocks they have 6 weeks difference in age  and on respects the other.

There are always exceptions to the rule.

Agree with the little pink frog for once, they are probably testing each other, at that age they are not sexually mature so it wont be serious!

There are a few factors which affect a cockerels inclination to fight,  firstly the breed ,some are far more aggressive, game birds for example are naturally an agressive breed, not with their owners but will clash with another cockerel usually to the death of one of them.
The age and if they have been brought up together, boys that have been brooded together are quite easy-going - until girls are added!
Available space and importantly the ratio of laying hens. I have a few boys together, however as I have a "policeman" which is an older, eperienced boy who will keep the other cockerels in line.
If you have boys together without hens they might sqabble but it shouldn't be serious, and any problems can normally be sorted by adding a mature cock who quickly will assert himself and will not normally tolerate fighting. Having hens will cause them to compete against each other as well as the time of year, spring can bring problems amongst normally friendly cockerels!
Space - if they only have a small space, they will have trouble avoiding each other and will become fractious and may fight. hth

Well my boys despite having been brought up together, having loads of space and no girlies around are determined to do damage to each other, so I'm keeping them separate, although this means they are both on their own. Would popping my daddy cockerel in with his boys do any good? Or is it too late?