Hello! Good sentence — it is easy to understand. Here is a clearer way to say it:
Corrected: Eucalyptus leaves are poisonous, but koalas like to eat them a lot.
Why this is better:
- “Are poisonous” sounds more natural than “have poison.”
- “Like to eat them” makes it clear the koalas are eating the leaves.
Short fact: The leaves have special chemicals that can be harmful to many animals and people, but koalas have bodies that help them eat the leaves safely.