If someone's face looks like an animal's snout, you can say it's snoutish.
Snoutish might make people think of animals or of someone being rude.
Examples:
The man has a snoutish face.
She made a snoutish face at the dog.
The snoutish boy made everyone laugh.
The cat looked snoutish when it smelled the fish.
The snoutish man could smell things from very far away.
The snoutish girl made a funny face at the mirror.