Join Date: Oct 2011
Location: Illinois www.saddleonline.com
If you aren't willing to commit to replacing your saddle just yet, start riding with a big thick pad or put two pads under the saddle to help while he's gaining weight and muscle - they do not have to be super expensive pads, just nice thick fluffy ones. Let him gain some weight and muscle and then re-assess him or, if you aren't good at saddle fitting, have a more experienced rider or professional saddle fitter assess him and make a decision from there.
"Riding: the art of keeping the horse between you and the ground."