My saddlebred is my heart. He is almost 6, a gelding, and as he was growing up, he was the submissive horse (rather, forced to be). Now, he is home with me and as I bring a new horse in, he becomes aggressive. Not all the time, mind you, but more like a sudden urge comes over him to be mean...

Hi All: My neighbor bought a beautiful 18H abused 4 yo gelding, turned him out with daily feeding and training and handling for 6 months, had him in training for 2 months with a very lightweight trainer, no problems, well behaved, then he comes back & bucks and spins every time someone gets on...