duramycin even for respiratory disease is a waste of money and time
go with pennicillian and do give it the full time as a partial treatment is wasted effort
tylan 50 is also good
sounds like the birds need some wet mash probiotic with vit E and B complex
any questions email me
yes any bird with canker will shed disease germs daily in the water
and yes it will not be cured but you can get flagryl from foy's pigeon supply on line
and they have good info on canker there also
NO there is no cure for canker but have to feed medication till they die from it
the duramycin...