Today I removed a dog crate that I was keeping my almost 3-month old chicks in (and replaced it with a gate that divides the coop/run). When I took the crate out, I found this underneath (see photos). Does this suggest mice or rats? Or something else?
We had rats digging tunnels like that around our water pump, it looked exactly like the picture. But then against the hardware cloth, that's too small for rats. Mice, perhaps?
We had flooding rains 2 years ago. The rat tunnels flooded and the rats went to higher ground, my chicken pens. It was a 3 week battle but I finally got them under control.