My 4 month old puppy Sara , a chihuahua, has one problem that I cannot fix she not leaving things like our cat alone.
Our cat is not aggressive whatsoever and doesn't usually attack her, if anything he plays with her, but her constant aggravation of him has him, every time she comes near, hissing and growling. I'm afraid that he is going to hurt her, or visa versa.
She is proving a difficult dog to train because she doesn't really have all her gears turning if ya know what I mean. But I believe that no dog is un-trainable.