I would avoid hay if at all possible.
While the article and the term for the mite is "straw" it is in fact more of a problem in hay than it is in correctly harvested and stored straw. It's one of the reasons hay makes some people itchy while clean straw doesn't.
https://www.backyardchickens.com/articles/straw-itch-mite.75561/
While the article and the term for the mite is "straw" it is in fact more of a problem in hay than it is in correctly harvested and stored straw. It's one of the reasons hay makes some people itchy while clean straw doesn't.
https://www.backyardchickens.com/articles/straw-itch-mite.75561/