I removed 4 colonies from houses last year. These bees were healthy,very large combs. Tons of brood, tons of honey. One colony was there for 6 years. No one was treating them with anything. I treated them with OAV this past Sept. since I have mite paranoia! I don"t like the idea of using a "cut out" as a guinea pig, but I think I will try. I will NOT treat a colony I remove this next season. I will conduct mite counts so I don't end up killing them.Why are these bees doing fine with no help? I know it was luck , right? Please share your thoughts. Maybe we are interfering more than we need to. There is a chemical for everything out there. Just like there is a drug for every human problem.