This one is a puzzler. Anything I say is pure speculation. My knowledge of the chicken niche consisting of precisely one story, yours.

Your story meets the basic curation standards. It's well written, has links to appropriate outside authorities to back up your claims. formatted nicely.

What I find interesting is your previous 15 stories for this publication were curation within about two hours.

One theory is that a curator, possibly one assigned to Creatures, was almost automatically curating their stories. Maybe this curator changed. Maybe they liked chickens stories at first and then said, this chicken shit is getting out of control.

I'm shooting in the dark. Curation is a dark mystery. I wish I could help you more.