So the people who were boarding a horse at my house moved her horse out of the paddock a couple months ago and now my horse, who the horse was keeping company, is very depressed so we are using this an excuse to buy me a new horse. The new horse is an 11 year old mustang gelding. I met him he is very sweet and gentle. He is broke aswell. He is at the moment living with 15 other mules,donkeys and horses. So I dont need to worry about him getting along with others. My horse is a 27 year old quater horse who totally does not act his age and is always at the top of the pack. The mustang is not the top of the herd where he is. So what might be a good way to introduce these 2?