runny noses

Hi, The last couple weeks I have noticed that some of my chickens and ducks have had runny noses and have also been eating their straw bedding. what causes them to have runny noses? what can I do to help them? why are they wanting to eat their straw bedding? they can't be hungry because there is...

This is my third post about my chicks sneezing. It never seems to end. My chicks started sneezing at about 1 week old, and ever since they haven't stopped. For the first 3 weeks I used very dusty pine shavings, but got rid of them and replaced them with larger shavings as soon as the other stuff...