Here's a breakdown:
When it's OK to use "who" for animals:
* Personification: When you treat an animal like a person, you can use "who." This is common in fiction or when talking about pets.
* Example: "The dog who saved the little girl from the fire is a hero."
* Emphasis on intelligence: You might use "who" to highlight an animal's intelligence or understanding.
* Example: "The chimpanzee who learned sign language was a remarkable creature."
* Specific individuals: If you're talking about a specific animal with a name, you might use "who."
* Example: "My cat, Luna, who is known for her mischievous antics, just stole my sandwich."
When it's better to use "that" or "which" for animals:
* General statements: When referring to animals in general, "that" or "which" is more common.
* Example: "The dogs that bark the loudest are usually the smallest."
* Talking about an animal's qualities: For describing an animal's physical traits or behavior, "that" or "which" is generally preferred.
* Example: "The bird that flew into my window was injured."
In summary:
While "who" is typically reserved for people, you can use it for animals in certain contexts. It's often a matter of personal preference and the specific meaning you want to convey.