Chickens don't eat mice? Or do they still eat?

Chickens don't eat mice? Or do they still eat? I was told no.

Once, one of the sofa specialists, almost foaming at the mouth, proved to me that chickens never peck meat or fish. In addition to grain and compound feed, they are enough for the most - this is for flies and worms.
To my objections that we have chickens, if possible, and a whole pig can easily be sentenced, this specialist only twisted his finger at his temple and refused to believe.
Especially for these:

Details in the article on our website: https://bayoun.ru/kury-myshej-edyat/
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