Ann, I think you nailed it. It is definitely a Honeysuckle (the
paired berries and opposite leaves are a good clue), and Lonicera japonica is a
good bet. It could be another species though, there are several native and
introduced to choose from, .
Christian, I doubt it will hurt the horses (and the birds probably love
it), but I don't know for sure. We never worried about Honeysuckle and
livestock when I was a kid. However, my Grandmother told me the berries
were poisonous (but I never got sick when I ate a few - probably it's a wonder I
ever grew up with the things I tried). Don't think she really knew
one way or the other. I still hear and see mixed comments on the
toxicity of the berries, but don't recall anything about the plants
themselves. I've heard of people actually making jelly out of
some species. Anyway, wouldn't hurt to find out for sure. There are
online lists of poisonous plants, and your extension agent should know,
at least if it's a common plant in your area (and it probably is).