I started to look at the link to backyard chickens thread on medications. 18 pages is a bit much to poor over to find evidence that
[COLOR=333333]chlortetracycline shouldn't be used in poultry. So I did a search and limited it to this past year.[/COLOR]
[COLOR=333333]Dr Jacquie Jacob, University of Kentucky published May, 5, 2015.[/COLOR]
http://articles.extension.org/pages...ed-for-use-in-conventional-poultry-production
FARAD Sept, 18, 2015
http://www.usfarad.org/drug-wdi-faqs.html
Then I read a bunch of studies about commercial practices that are providing eggs in US above the allowable levels. And studies showing dosage in feed and comparing to amounts in egg whites and yolks over time that dosage was being lowered in feed. No actual withdrawal.
Are we just saying that on a micron level that there will be tetracycline in eggs for months after medication is stopped? I'll buy that and not research anymore but the current data is suggesting this is not a problem under regulated levels. In studies of slow withdrawal of medicated amounts in feed, the amounts in eggs went down as fast as the daily intake and always less. Suggesting there is a fast withdrawal.
It's important when stating things that the entire knowledge base be addressed. For organic people and naturalist any amount is horrifying. I get that. I'm just not seeing any evidence that micro levels far below any regulated standard is hazardous or ill effect to health.