problem are some are sending ill birds, other problems are some are relying on quantity rather than quality , whether your birds are in same baskets as these ill birds there getting cross contaminated from water or eating corn from birds been sick in there baskets and eating it , other problem is birds not been vaccinated , from what i've read there problems with avian pox , Newcastle disease , and salmonella and young bird sickness , the root of most of these problems is most birds are been propped up with the medicine cabinet and have no immune systems left . years ago ill birds would be removed and not propped up that's the biggest difference .