Saddle fitting – Horses change considerably over time. A horse’s ‘shape’ is very dependent on the horse owner’s management. What may have fit your horse as a five-year-old may not fit now. Age, fitness, weight, and rider weight/size will all effect the fit of any saddle on any horse. Reasons why a horse may change shape A horse can change shape for many reasons. A young horse will quickly outgrow a saddle due to musculoskeletal changes. A mature horse may be enjoying a break from work turned out in a field with lots of grass causing unwanted weight gain. Possibly,