1.This option is suitable for large dogs, e.g. German Shepherd Labrador/Golden Retriever etc. and can improve bad behavior. 2.It is perfectly normal for most dogs to feel resistance when using a dog muzzle for the first time! The correct method reduces your dog's fear of the muzzle and gradually builds up the habit. 3.When he encounters something he's never tried before, he's bound to be scared, intimidated, and resistant! Use our instructions to help him adapt slowly, but that's the beginning of a good habit. 4.The design effectively limits bad habits such as biting and chewing, making it suitable for walks, veterinary treatments, grooming, and public places, but still allows for normal breathing. 5.In addition, our materials make it even stronger! As long as your dog doesn't intentionally damage our muzzle, it will last a long time! We're happy to invite you and your sweet fur baby to explore. Product Description: Dog Mouth CoverMaterial: PolyesterColor: Light GreySize: 17.1 x 10.8 x 2.4Packaging content: 1 x dog mouth cover Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.