I am 18, and I have had been sarounded by dogs all my life. I personally have a small dog right now a Jackrussel, Chihuahua mix. That I love to death. I do have experience with a range of dogs. From Minpins to Beagels to Blood hounds. And I do except all "aggressive" breads. Though i dont understand when so meany people dont. And I try to work with your dog, to keep it healthy and happy until you return.