In order to keep livestock safe from predator attack at night a full chain link enclosure must be used (sides & top). The livestock can be attracted into the enclosure when needed by using “desirable” feed like grain molasses mix. When calling in and then feeding is done routinely the livestock will learn to come with a call. The enclosure must be large enough to be comfortable and healthy for the livestock and may need separate compartments for young vs old, male vs female, fragile vs aggressive, etc.
Look for pre-made tube & chain link panels, like what fencing companies use then these can be “tied” together to from enclosures as needed. Other wise tubing, chain link, and coupling hardware can be purchased and panels constructed. Old corregated roofing from the YAHB old roof can be used as roofing and siding for these enclosures. (put over the chainlink).