Hello, I have had chickens for around 3 years. I have heard before that chickens like to eat tuna, but if you feed them too much, then their eggs begin to taste like tuna. So if chickens eat worms, then does that mean that their eggs taste like worms already? Just wondering. lol. By the way, today I was gardening with my chickens. (They were walking around and eating worms that I dug up.) and a field mouse scurried by. It was a fairly large one. My chickens actually chased it, and tried to eat it. I've seen my chickens eating mice before, but never any that big.