You said we may have to do successive Path Purges in the future. If we take oregano oil, garlic, Allin pills, the DFH purge formulas later— will it kill some of the good that we have spent time/money reseeding or destroy any of our good bacteria?

Certainly you will kill "some" of the good bacteria at a later point in your life if/when you redo the pathogen purge. The bone broth fast will not kill good bacteria, so that could be something you employ monthly (1 day of broth fasting per month). However, the reason we use DFH formulas is they are one of the only companies that has such a delicate balance of botanicals and not too much of any one in any formula, so they do the least killing of the good bacteria while maximizing the elimination of bad bacteria and pathogens by interrupting their communication vs. flat out killing them. When you go to "kill" with extremely high doses of garlic, oregano oil, etc. for an extended period of time (more than 3 weeks) you can kill the good as well— hence why we rotate botanicals and give lower doses and transition to a lower dose in the transition week. It's a good idea to rejuvenate your microbiome every couple of years based upon what life has brought you.