I dusted my chickens two weeks ago with poultry dust and two of them started sneezing and wheezing a few days later.I did put vet rx on one of them that was the worst twice and it did seem to help but when I stop for a couple days she starts again.She is eating and drinking and seems fine other that the sneezing. Can anyone help me with what to do and will this pass.The other one only sneezes occasionally now