My vet perscribed Keflex 250 mg orally to one of my hens for puncture wounds (presumably dog bite). I finished the pills nearly 2 weeks ago. How long before I can safely eat her eggs?
http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2885.2011.01287.x/full This article lists many of the drugs used on poultry. Apparently cephalexin can be found in eggs for a long time after use (>21 days in the yolk).