I never said anything about nutrition if ewes, I'm talking genetics. And you know, if you have a biological background where the superior genetics lie in the herd if you want to be honest and not just sell a poorly put together article.
 And it's not hard headed, answer this simple question. Do trees lose their leaves according to daylight duration or temperature? Simply look at the east coast fall color change, you have nights way above freezing yet the trees lose their leaves. And seriously, look it up yourself encyclopedia britanica boy. I get you are using gardening logic, but where does the heat come from...the sun? Is heat then affected by sunlight duration? 
This must be a great argument for you, because it keeps to the fact that your article has holes in it. Which I am sure it is why you are defending it so hard in the comment section.
Also, let's get this straight from your responses. These best genetics are harvested, yet you have seen no decline in horn size...