Agree with the above. Research is very important for the top 25-ish schools (who are ranked highly largely based on research funding), but outside of those schools you can have a competitive application w/ minimal research if your stats and EC's are strong. I can't speak for DO, but imagine that if you have good stats and EC's then you will have a good shot.
FWIW, I go to a top 20 and know a few people in my class who had minimal/no research experience in undergrad (though I assume they had other impressive things on their applications).
Would be a good idea to look at the MSAR where I believe you can find what % of their students had research experiences before matriculation. 
P.S. Nice user name!