To access Snapchat dog lenses, first, point your camera at your dog and tap their face to reveal the lens carousel.
If you want to find filters that are suitable for pets, you should look for those with a blue paw print icon, which indicates they are intended for pet features (some favorites are "Cartoon Face, " "Butterfly, " and "Pizza").
For optimum capturing, a well-lit place is recommended, preferably with natural light. Also, being at a distance of 1 to 2 meters from your pet will allow the AI to accurately map your dog's face.