Good afternoon. I have having a difficult time finding information on evergreen plants that can thrive in Eastern Oregon as a hedge along a fence line that are NOT toxic to horses (multiple neighbors have horses and though we will be planting on our property, we'd like to be respectful to our neighbors and their interests). We are in the zone 7 growing area by most accounts. I've ruled out most of the typical evergreen hedge plants due to being poisonous to horses. Other than arborvitae, are you aware of evergreen plants that would be appropriate in our situation? I've read conflicting information on euonymus species, viburnum and junipers. It appears abelia, snow brush and wax myrtles may work and don't appear to be poisonous to horses. Any information would greatly be appreciated.