FOR SMALL & LARGE PETS - Compact design works well on smaller dogs, cats, and puppies.Also works great for larger dogs as long as your finger can reach their teeth.Note: it ma not work as well on extremely small pets, such as toy breeds. 

FITS THIN & THICKER FINGERS - JUST ADD WATER!  - Adding a few drops of water inside makes the silicone expand for larger fingers, and creates a seal for smaller fingers - no more slipping off in your pet's mouth!