Although the lambs could care less about the dogs their moms react a little differently. They are very protective and will charge a dog. We have put our older dog on the moms and lambs and she took a wide circle around the flock. She has been butted before. One of our 2 year old male dogs brought the sheep in off of some wheat my husband let them graze on and he did real good. It doesn't matter how small of job it is to the dogs it is all work.