We have had issues with him jumping the fence to chase off other dogs, running up behind strangers in our yard and acting aggressive. he is housebroken to both puppy pads and a doggie door. he has spent last few months chained due to not staying in the yard and running up on people. he is dog aggressive as his mother played really rough with him and he continues it with other dogs. he was born in an abandoned house the last of seven puppies, the mother dog was used for fighting and as a guarddog. she has now been retrained as a service dog. i do have high hopes for Hemi but i'm the only one he seems to listen to. he has the best manners in public, at the vet, and in the car, but at home it is impossible to have any type of visitors without having to have him locked in another room or in the garage. he comes with lifetime guarantee to take him back if it doesn't work out. I will transport nationwide for small fee.