I understand what the difference is as far as what the dog needs to do to achieve each title. Just curious as to why some dogs stay at SH level? Is it because that is what that particular dog is capable of? Or does it have more to do with that is as far as the owner wants to take them. I would think any dog that can be trained to a SH level would be able to obtain MH status as well. Or am I wrong in thinking this? Are some dogs only capable of a SH level and not "smart" enough to go on to MH? I have a pup with a SH sire and am curious if it is the dog or the owner that chose not to go on to a MH. Hopefully this makes some sense???