Our best farm dog was Daisy, a 3/4 Collie 1/4 lab. She alerted us to anything unusual or that didn't belong like other dogs, hawks, wild animals, and injured or excaped livestock. She protected our animals, us and our kids and was always on the job. She was with us for 12 years and though I have looked for about 10 years now (and continue to look) for another like her, I think she was exceptional and cannot be replaced.