My best calculation would be 1/4 of a teaspoon to a litre of fresh water daily. It must be mixed fresh each day and remove any calcium sources ( calcium carbonate , shell grit ) .
The treatment is pretty much the same for most of the CRD's.
http://www.drugs.com/vet/aureomycin-soluble-powder-concentrate.html
Thanks. I have been having trouble with losing posts lately after typing them. So second time round missed the dose they listed.
The dose you suggest is the same as for parrots 5g/l. For pigeons and finches it's half that. For ornamental birds they have a dry administration of 5g/kg over feed.
Thanks again. I really appreciate your help.
I feel very silly though, I thought it best to dispose of the buttercups body straight away. I should have raced her to the vet for testing.