Free images results:

Muzzle pictures, stock photos and images


Horse Royalty Free Stock Photos
Author: Ladyann
Lion Stock Image
Author: Anp

Also, here are some commercial RF-licensed images that match your search criteria:  
Cow muzzle Royalty Free Stock Image
Author: Makar

Explore more commercial options: More Muzzle Stock Illustrations & Vectors | More Muzzle Stock Video Footage