Competitive hours for DO shadowing?

Hello All ! 1. What is a good number of hours for shadowing to be competitive (I have two DO physicians that I am shadowing right now: one in primary care and one in non-primary care). 2. Are 25-30 hours in each specialty or in another way 50-60 hours total be enough? Currently, I do have around 40 hours across the two specialties. I plan to get up to around 60 hours and stop. Any input would be appreciated and thank you!
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Pre-Medical - DO Source Type: forums