Curious schreef
Is sandalwood poisonous if eaten?

* * *
Another aspect is poisonous to whom?
Things harmless to humans can be poisonous to pets. Apparently chocolate can
be lethal to dogs, and avocado fruits to birds. Woods guaranteed to be
non-poisonous when ingested are a fairly hot topic for bird owners, wanting
to put sticks, roosts, etc in with their bird.

A few woods are known to be poisonous when ingested (black walnut to horses
is often mentioned, as is yew to apparently everybody).
PvR.