I have never saw before this weekend. I meet with friend to do a little work on some equiptment we both brought our dogs. Mine is 14 month old male and his dog is about 10 year old male. It started from the time we meet up to load my dog in his truck my pup acted like he was scared and then once in the back of the truck he growled at his dog. Once we got there my dog was fine with my buddy and then we let his dog out they got a long great then about 5 min after they had been out together my dog bit his dog on the ear didnt bring any blood but this will not be tollerated frome me. What can I do to make sure this does not happen at a test. I have had him around people from day one and several other dogs. I take him all over town with me and in to any store that allows him in.