I was gifted an 12 year old Kuper cock a few years back and tried to pair him to various hens but he wasn't interested and spent the whole season sitting on top of the boxes in the stock loft. I got a Brinkman hen at Blackpool the following season and he took to her no problems and I got 3 nests off them that year. I loaned him to a friend and he did the same thing in his loft, nothing and it carried on into the 2nd season with no change so I suggested he take the Brinkman hen that he was paired too in my loft and it wasn't too long before he was back in the nest box. He continued filling his eggs until he was 16 years old.