Hugo be careful with this dog around your children friend which I'm sure you know given as much experience with dogs as you have under your belt. I have had this experience with a rotty, dogo arg, and airedale. Best to send this dog back. My opinion that some of the humaniacs may not like is that a dog like this isn't worth a damn and is a possible liability. IMO placing this dog in another home wouldn't be responsible unless that place is back to Boz kenn. Probably the best remedy for this dog is a .22 calibur sleeping pill I think he can swallow it if you put it between his eyes.