Boomf is a site that allows you to make birthday cards for your dog. You can choose from a wide variety of designs, and the process is very easy. All you have to do is open the Boomf app, input the information about your dog, and choose the card you want to print. Boomf even provides a few sample cards to get you started. Once you have finished creating your card, you just have to hit the print button and wait for it to be delivered to your door!