No problem! There is a local poultry website for Ontario and I can pm you the link if you'd like. I haven't had a whole lot of experience with duck injuries thank goodness!
I hope your duck is doing well
http://www.irishwildlifematters.ie/animals/bird-drugs.html
Here's a website on drug types and dosages for wild birds and what not. Just googled metacam and all I've found is that it is fatal to cats. Causes renal failure so just keep away from kittes
And from another Ontarian~!