I think sending letters by committee is optional. I asked at my undergrad, and they've done committee letters for podiatry school applicants before. Also, there's a pdf somewhere on the site for podiatric colleges that says what each school requires in terms of letters of recommendation, admission, etc., and on that pdf most of the schools say they accept either individual letters or committee letters. You can always ask your adviser the best option. I know for MD/DO med school, my advisers used to say that it made you look a little sketchy if you bypass a committee if it's available because they give a "stamp of approval" that they believe that you're the right person for the profession/school, but pod school might look at it differently. Maybe someone who's actually gone through the process of applying already can give you a little more insight.