we recently came into owning a 5 year old stallion. This horse had lived with a group of horsed on the place he came from. we had him gelded 3 weeks ago and today tried to introduce him to our herd. he was fine with them for several hours and then suddenly he started trying to attack them. He broke the old gelding out of herd and was continually biting and chasing him. After we finally got them seperated and i caught him he walked out of the pen like nothing happened. my question is will do you think he will get over this behaviour with time or has been a stallion for two long.