We used to joke and say he was gay
I'm pretty sure my Dallas is
He's 9 in October and has never shown any interest - even with one bitch who was flaunting herself in his face
Maybe Zen doesn't want to be a daddy - he maybe sees himself as a carefree bachelor, the George Clooney of cocker spaniels
I imagine it would be frustrating though if he is part of your breeding plans.