I have four guinea hens, one about 15 weeks old and the other three a few weeks younger. They started sneezing about four days ago and I figured it was because their pen was dirty so I cleaned it and decided Id wait a few days and if they didn't stop, ask you guys about it. They havent stopped. They started sneezing on a really rainy and humid day so could it be because of that? Is there anything I should do or give them or will it just go away?I house them with three peachicks in similar age but I haven't noticed them sneezing. And I don't see anything except the sneezing wrong with the guineas. Their eyes look clear and they seem to be going about their normal routine. Is this anything I should be worried about? Also, yesterday, my oldest guinea's beak started looking kind of flakey. I can get a few pictures of it if that would be helpful.