My Silkies are in our garage in one of their runs until we finish up coop ventilation etc,hopefully real soon. Meantime back at the farm.......... should I already be using a preventative mtce product on the Silkies . They just turned 9 weeks old. I clean after them during the day and night , DE (food grade )is in with pine shavings in a small litter pan mixed together but not throughout the run. The garage has a cement floor.I use ACV daily in their water holder,which will not assist mites only internal pests.They get garlic chopped fine with brown rice daily as well ,also internal mtce not external. I prefer the more natural preventative measures if such exist. I plan on using vaseline on their legs if/when they do get mites. I do not know if chickens are ever free of them or must bemaintained thru their life due to necessity. I will continue to use garlic and the ACV for their lifespan addressing the parasites. BYCERS ,is there a "product" out there relatively effective,low cost, have a very low side effect impact,and tried and true?