Animals·Posted on Aug 1, 2013Happy Birthday To Tuna The Heartmeltingest Dog On InstagramHe's a Chiweenie with a bit of an overbite, and he just turned 3 years old!by Sami MainBuzzFeed StaffLinkFacebookPinterestTwitterMail 1. HAPPY 3RD BIRTHDAY, TUNA! View this photo on Instagram 2. Let's take a look back at the past year! View this photo on Instagram 3. Remember when you came out with your own iPhone cases? View this photo on Instagram 4. And when you modeled your own T-shirts? View this photo on Instagram 5. And when you found your celebrity lookalikes? View this photo on Instagram 6. View this photo on Instagram 7. View this photo on Instagram 8. Or when you were super stoked to celebrate Easter? View this photo on Instagram 9. You were so good at napping outdoors! View this photo on Instagram 10. Remember how great you were at Fourth of July-ing? View this photo on Instagram 11. Thanksgiving was a little rough... View this photo on Instagram 12. ...but it was nothing a little nap couldn't fix! View this photo on Instagram 13. And you were especially good at doing Christmas. View this photo on Instagram 14. Remember when you totally rocked those kicks? View this photo on Instagram 15. Good job, Tuna! View this photo on Instagram 16. Keep up the hard work of being adorable! View this photo on Instagram