Home made pet food

This stuff scares me as our Darcy (min pin) after personally making the Calif field mouse extinct, is working on decimating the alligator lizard population. She doesn't just kill them, she eats them. :E She's put on weight and I can't convince her that we LIKE lizards, they keep down the bugs in our yard. She's got a fierce prey drive and we've never had a dog like that before. Other than keeping her in the house as much as possible, I have no idea how to discourage her. My brother's cat died from eating blue belly lizards, but we don't have those here. If Darcy ever spots a baby rattlesnake, it will be a tragedy.