 He has an overbite that makes him look like a cartoon character, a slightly crooked eye, and an uncommonly wrinkly neck. In the right light, he can look a little like a garden gnome, and he'll wear a bow tie just because. Sure, you might call him a little quirky, but that's exactly what makes him so perfect. Tuna is a three-year-old Chihuahua-Dachshund mix with more than 700,000 followers on Instagram, and it all started because he was adopted. You can't buy a best friend like Tuna, but you can adopt one. Help us save them all at bestfriends.org.