I'm curious about your training. Our chickens all naturally eat mice. Just like me and Bacon, no training needed. Our flock loves to play mouse football. Toss in a mouse or two, one grabs the prey and runs around as the others chase and try to take it away. We use live mouse traps in the Sheep feed room. I collect the mice, drop them in a bucket of water, They get tired out so they run a bit slower for the chickens.