Certainly we can't control what chickens eat when ranging but keep in mind.
This from an article in Hobby Farms by Mike Wilhite. You can find the entire article online just google "mice and chickens" it will pop up.
Rodents are responsible for more than a quarter of all farm fires of unknown origin, but the main risk from infestations is feed contamination and disease exposure to both you and your flock. A rat can produce more than 40 droppings per day and a gallon or more of urine per year, while a single mouse can produce more than 80 droppings per day and more than a quart of urine per year. A variety of human and livestock diseases are spread through contact with rodent excrement, which include cryptosporidiosis, toxoplasmosis, leptospirosis, brucellosis and salmonellosis.
This from an article in Hobby Farms by Mike Wilhite. You can find the entire article online just google "mice and chickens" it will pop up.
Rodents are responsible for more than a quarter of all farm fires of unknown origin, but the main risk from infestations is feed contamination and disease exposure to both you and your flock. A rat can produce more than 40 droppings per day and a gallon or more of urine per year, while a single mouse can produce more than 80 droppings per day and more than a quart of urine per year. A variety of human and livestock diseases are spread through contact with rodent excrement, which include cryptosporidiosis, toxoplasmosis, leptospirosis, brucellosis and salmonellosis.