Rodents and raccoons are the only two creatures I can think of that would be interested in chicken feed itself. The coop is simple in design, bedded with wood shavings, and elevated a couple of feet off the ground. There isn't any place rodents could hide. I've closed off all gaps in the run with wire mesh including the gaps at the run's roof since raccoons are good climbers and good at squeezing through tight places.
I've seen and heard foxes but only on other people's property, no traces near the coop. The local raptors (coopers and red-shouldered hawks) are too small to take on a flock of fully grown dual breed hens and prefer other prey anyways. The hens still keep an eye on the sky when they're free-ranging but quickly resume foraging even when a raptor perches in the tree above them. Haha!
There's also a tree nearby that houses some cardinals. The cardinals have tried sleeping the in the run but haven't displayed much interest in eating the feed.