Some more information on the subject.
https://extension.psu.edu/barley-straw-for-algae-control
It’s seems like a good idea but something to consider is that any time you’re keeping wet or damp organic material like straw around you’re also creating your own Aspergillosis grow, the risk of illness is then higher especially if sunlight isn’t a daily guarantee to dry everything out and the animals are kept in a smaller space where used decomposing straw is nearby.
https://extension.psu.edu/barley-straw-for-algae-control
It’s seems like a good idea but something to consider is that any time you’re keeping wet or damp organic material like straw around you’re also creating your own Aspergillosis grow, the risk of illness is then higher especially if sunlight isn’t a daily guarantee to dry everything out and the animals are kept in a smaller space where used decomposing straw is nearby.