If your favorite dog is Bull Terrier, this is your app. Place the cutest dog on your dialogue chat. How to use Bull Terrier Puppies Stickers: 1. Open or start a conversation in imessage 2. Tap the "App" button to the left of the message field 3. Tap the button in the bottom left of the screen to view your installed iMessage apps 4. Tap to open 5. Attach stickers to messages by tapping and holding on a sticker to peel it up then drag it to a message bubble or photo to stick it to a message. 6. Enjoy and have fun!