Male rabbit stopped breeding

So i have a male new zeleand to breed my 2 females and i stopped breeding in the spring due to heat and having started my chickens i only need a few litters a year to stock up for myself for the time, how ever my brother brought my niece over to breed her female and nothing this was in the middle of summer as hers are kept in the barn. he refused and just the other day they tried again with no luck he just sits there. He is a very friendly buck loves to be petted and has bred for me before and the owner i got him from he is only going on over a year. I am not sure why all the sudden he stopped i have reduced the food a little and started increasing the hay but he seem in good shape im wondering if his location is the problem, he currently is in the cage between my two does. Would the constant scent of the females be disrupting his mood? he was rather new when he did his first few breedings for me and my niece.

Hi Hunter;
Well my first thought is of course not applicable... he doesn't like her...  now that I have that out of my system...
Try a new location away from the other female.

You should keep your bucks separated from the female cages, and you might want a dedicated breeding cage that is at least 10 feet from both the boy cages and the female cages.
Another thing to consider is, that doe might not be in estrus at the moment, which would mean no breeding interest by the buck.
I do think that if you are keeping all the rabbits in a close spaced environment, that could create issues both with breeding and fighting.

I have one friend that raises rabbits commercially, his herd fills an older chicken house (50' wide x 300' long x 12' high) which is half the width of his rabbit house, everyone has their own cage with auto feeder and piped fresh water.
He told me, when I was thinking of raising rabbits for meat, that I needed at least a cover, individual cages for each doe and each buck and he recommended I also have special "breeding cages" so no one was in their own "home" when I was breeding a doe.
His set up is very neat and he makes half his living from selling rabbit meat so I was sure he has the line on rabbits, once he and I talked about all my options, I chose chickens and ducks. Rabbits are still on my list but they have moved far down my list lately.

Redhawk

They are in their own cages, its a one long hanging cage that is in side of open sided chicken coop but the male is in the middle cage so i think in the spring i will relocate him. he was kept here because they are all on a auto water system. I kept my kits with the mothers until they are weaned about 5 weeks then they go into tractors and go on grass and get pellets until butcher size. they all get pellets free choice of hay and have even mineral chews which they dont even eat smh. I have the 3 sides of the large chicken coop covered with tarps for a wind break and the breeder rabbits have nesting boxes with straw to nest in for warmth.

My male also stopped. I brought a doe in for the first time 4 days ago. He was very interested and mounted many times, I pulled him off the last time because it got a little violent. I separated them for the night and the next morning tried again, he now has no interest whatsoever even though she tries to get his attention and follows him everywhere. So I brought another doe for him, even less interest in her, he just lays there and ignores both of them. I don’t understand because he was so interested it was ridiculous, he would fight us to stay with her. Any clue why? We keep them all separated and always bring the does to the bucks cage, have even tried neutral ground.