Is fur poisonous to animals?

It depends on what you mean by "fur" and what kind of animal you're talking about.

Here's a breakdown:

* Animal fur itself is not poisonous. Fur is simply hair or wool, which is made of protein and keratin. These are not toxic substances.

* Some animals have fur that contains irritants or toxins. For example, some caterpillars have hairs that can cause skin irritation or allergic reactions. Some poisonous animals, like the poison dart frog, have toxins in their skin, which can be harmful if ingested or touched.

* Some animals may ingest fur and have problems digesting it. This is more common with animals that eat wool or fur-bearing animals (like cats eating bird feathers). Ingesting fur can cause blockages in the digestive system, especially in smaller animals.

It's important to note:

* The toxicity of fur varies greatly. Some animals have very mild irritants, while others have toxins that can be fatal.

* The effects of fur on different animals can vary. What is harmless to one species might be harmful to another.

* It's always best to err on the side of caution. If you are unsure about the safety of a particular type of fur, it's best to avoid it.

In conclusion:

While fur itself is not inherently poisonous, certain animals may have fur that contains irritants or toxins. The effects of fur on animals can vary depending on the species and the type of fur. It's always wise to research the potential risks before handling or ingesting any type of fur.