problems pairing up

[KoryGall]

I've recently paired up my stock birds (14th Dec) for my first year flying out of my  16 pair, 14 have paired without incident but I have ended up with 2 pair that refuse to even look at each other I've tried swapping the hens to no avail (the cocks have been with both hens for a week each) due to the age of them (all 4 around 7/8 years old) I would really like to get something out them before they finish any tips would be greatly appreciated as at the moment I have run out of ideas 

 

many thanks 

Kory Galloway

[sapper756]

If they can fly out. Let a pair out to fly alone. This has worked in the past for me