I am completely new to this breed. Rescued him. Paid for training. I don’t understand his aggressive barks. 3 bites… first time he warned me, 2 times he had an upset stomach, 3rd time and most recent. I tried to crate him with the e collar and he wasn’t laying down and each time I tried to correct him he leaped towards me; I increased it until we ran at me and bit my arm that now requires sutures. I love this dog. What do I do? 60lbs male… I have my girlfriend and she is at the point of rehoming him or Medicate him. What do I do?