Closing in your sheep and goats at night

I have a question for everyone.

I have 3 St. Croix sheep and 2 Kiko goats. I just moved them out to a summer pasture. It's approximately 135' by 140' chicken wire on T-posts with fiberglass support posts because chicken wire is less than ideal, it has grass, autumn olive, pine trees, etc. Ideally I would run them in a much smaller electric fence pasture, but that is a story for another time.

We usually put them in a small shelter at night, the goats shelter is not finished yet so I was walking them to the barn and locking the sheep in their shelter in the pasture.

My question is, do I need to lock them up at night? My thought is that if a predator gets through the chicken wire it will get through the snow fencing (my dad built his shelter, I am either scrapping it or repurposing it soon) on the shelter.

Now the concern is that I don't have a LGD. I have other dogs that I take down there with me when I check the livestock.

Any advice is appreciated,  I don't know if an LGD would be ideal in my situation.

As always, the devil is in the details.  Where do you live? How much land is involved. What is the fencing like?  As you respond, ask your neighbors with livestock what they think.


Oh yes, welcome to Permies.

I am in West Michigan, about 30 minutes from the lake.

I am on 30 acres, the livestock pasture is on an approximately 11 acre parcel.

As I said, the fencing is chicken wire.