That's why I'm thinking it's a rat. The wire underneath should keep them out, but rats can be pretty widely that way. I'm hoping the bait on the outter wall of the barn wall will be an easier meal...
I just got an order of 25 chicks. They're in a brooding pen, 7 feet long 3 feet wide. Standard hardware cloth sizes, open bottom, and I have netting over the top, and I secure it with boards and a piece of sheet kettle for the big hens to roost on. ..
They're 2 weeks old. Last week, there were...