just recently my goat has a snotty nose. sometimes he sneezes and caughs. its only when i walk him around and im done working on him. the first day it was clearish but today when i walked him he had a giant white snot running down his nose. i have no idea what to do, is it allergies? a cold? or just dust/dirt in his nose or a major problem? but he seems perfectly fine. he plays with his friend. when i come in the barn, he always runs up to me and always begs for his food. what do you think it is, any ideas?