Re: bees been treatment free for 3 years now they have alot of mites do i worry
It sounds like you have some great hives there. You may want to take out an insurance policy on them, by splitting off a summer nuc from each one this year. If one of the main hives fails or starts failing for any reason, you can pinch and slip. Pinch the old queen and slip in a nuc into the center of the broodnest area of the hive.
20+ years, raise my own queens, feed when needed, I treat but have not perfected varroa management yet.