Identify a feature that can be used to differentiate between a dog and a cat.
One feature that can be used to differentiate between a dog and a cat is the shape of their ears. Generally, a cat's ears are upright and pointed while a dog's ears can be floppy, droopy or erect.
Complete the following task based on the instruction and optional input provided.### Instruction:
Identify a feature that can be used to differentiate between a dog and a cat.

### Output:
One feature that can be used to differentiate between a dog and a cat is the shape of their ears. Generally, a cat's ears are upright and pointed while a dog's ears can be floppy, droopy or erect.