I used to. I don't any more, it just felt incredibly wasteful. Most of the meds are used in people too, so not an issue with toxicity. The residue is very low in eggs and dissipates quickly so I don't worry about it any more. If someone were allergic to the medication that would be more of a concern. I always tell people to do what they are comfortable with. If it bothers you then the usual recommendation is to toss eggs for 10-14 days following treatment, so with the two doses 10 days apart that would be 20-24 days of tossing eggs. And considering flock size, that's a darned lot of eggs. I've been eating the eggs for many years and have had zero issues. If you sell eggs or give them away then I would either not during that period, or I would disclose to them that the birds have been treated and let them decide.