Hi, we have a large sheep and goat herd of about 400 which fluctuates as they are feeders not breeding stock. Right now we also have Dora (10 months Komondor/Australian Shepherd) Bo (10 months lab/Bassett/Golden mix) and Nala (3 year old Pyrenees). The younger dogs have been with the herd since they were 5 months and Dora was raised with a ewe/lamb herd. No problems to really report until today. Nala joined the herd a few weeks ago and has been great she came from a nanny/kid farm where she excelled at her job. The family sold their herd and rehomed her with us. My family is fairly new to LGDs besides my own research and knowing other families with them. Saying that my husband went to where our herd is a few miles away from our house and found 4 dead lambs 1 injured. These lambs weigh 50 to 65 pounds. The injured one had his side ripped open same with 3 of the other dead. The last looked to have died of other issues. Bo was next to one of the dead, but was not interested he checked on the injured lamb and moved on. Nala was in the cattle pasture minding her own business. Dora my husband said acted very guilty and avoided the bodies and injured lamb. She has been caught chewing ears and cornering lambs before. Does anyone have any ideas how to stop this behavior? She is young and possibly playing too hard (grabbing sides and such). All the dogs get along great and have kept coyotes away since they have joined us.