Milk thistle, dandelion root and other naturopathic liver protectants are controversial at best & cannot reverse damage already done to the liver.
They are also very bitter to taste and unless you give them direct to the bird's beak/crop you've got little chance of getting them to drink it in water or eat any food in which it is mixed.
What Monotwine is doing is the best approach. Clean everything out in the aviary and in particular check the food sources. Even seed that smells ok can still carry aflatoxins. None of us know what happens to our seed from the time it is harvested to the time we buy the bag. Not all seed merchants store their seed properly, or can effectively protect them from rodents and weevils.
Store all seed properly- keep it dry & cool.
By the way- you don't feed stale ( mouldy) bread to the birds do you? ( Sorry, but I had to ask!)
