Thanks guys

Luckily I found a store that sells Amprolium 200! Better safe than sorry hehe.
We have a few options in AU like Coccivet and Aristopet Sulphadim. I called up the companies and they said they dont recommend it for food producing birds. I do recall reading other forums using them regardless.
If anyone lives in Western Sydney, City Chicks in Marsden Park sells Amprolium 200 which doesn't have any withholding period for eggs nor meat!
Really appreciate all the responses on this thread

Thanks so much guys