MsLisaG - on the egg withdrawal time for FishZole, another name for it is Flagyl. The way we are using it - to treat canker - is "off-label" so since they don't make the drug for that purpose, we assume responsibility for any other applications. The closest I could come to an answer for you was based on a site I think in the UK. They suggested most antibiotics have a withdrawal time of 7 to 10 days, which sounds reasonable for this also I'll send you the link - it has a pretty good discussion on this topic of withdrawal time.
On the acidified copper sulfate, I can tell you there is no withdrawal time for that. Eggs are safe to eat.
http://club.omlet.co.uk/forum/viewtopic.php?f=37&t=70870
On the acidified copper sulfate, I can tell you there is no withdrawal time for that. Eggs are safe to eat.
http://club.omlet.co.uk/forum/viewtopic.php?f=37&t=70870