Changing Breeding male

So I just retired my breeding male and want to put a different one instead
how do I do that? 
I dont see anything appearing to let me choose a breeding male anywhere 

There is a 30 days cooldown for breeding male, if you retire him, IIRC

You can skip it using GC. It's been a while since I changed a breeding male in beta testing but there should be something in the Breeding page, I think?

EDIT: the 30 days cooldown starts from the day you appoint one of your wolf as Breeding Male.

I used 20 GC to retire the breeding male to not wait for the cooldown
The breeding page has nothing except telling me this wolf is not a breeding male in red
but the option to choose a diff breeding male at males pages just doesnt appear 
I went through every male I have none of them have the option to become a breeding male

The 20 GC cost is to retire him before he dies naturally. I think there is another 25 GC extra to skip the 30 days cooldown.

But I really don't remember where it was, so maybe your best choice is to modbox your question so that a Mod can help you