<p>^ Well, obviously. If you aren’t ambitious to become a dentist, then you may be looked down upon. They want enthusiastic applicants; not ones who have the thought process of, “I didn’t get into medical school, so I guess I’ll try dental school <em>sigh</em>”.</p>
<p>No, I don’t think it would be too late to start shadowing. Why would it be? And if it was, it’s better late than never. 
I’m a sophomore and I am just now looking into shadowing a doctor this summer and/or next school year.</p>