Guelder Rose Vibernum Opulus I would not recommend livestock eating the leaves, the berries are poisonous.

Viburnum opulus tends to get mentioned as a 'similar' plant when things like Sambucus or Symphoricarpos are being discussed.

But Cooper & Johnson in MAFF's 1984 'Poisonous Plants in Britain and their effects on Animals and Man' say '[it] must be considered harmless or of very low toxicity as no definite reports of [it] causing poisoning have been found'.

Nor is it mentioned in the 'International Poisonous Plants Checklist'.