Okey dokey, I have a question...I lease an Arab/Saddlebred cross named Moon. He's about 15.1 hh, weighs about 950 lbs, and is 18 years old. I was wondering how much weight he can carry on his back? My concern is that, because I lease him from the barn, he can be used by the trainer there. She uses him for trail rides sometimes and my concern is that she's too heavy for him. She's about 200 something pounds and rides him with a heavy western saddle for trail rides. Am I overreacting or is there true concer for his back? I ride him saddleseat and western: for western I have a synthetic saddle that weighs 20 lbs, give or take and the saddleseat saddle weighs probably less than that. Thanks in advance for your input!