I love my little fat chihuahua. Her name is Daisy and I've had her since she was 5 weeks old. She's now 5 years. But I have to say my very favorite dog I ever had was my female Rat Terrier. She was the smartest dog I've ever seen and the most loving, sweet and faithful companion. I had to have her put down a couple of years ago and I'm still not over the pain of losing her.