Good Morning Steve, 

Thank you for contacting the U of M Extension Service. 

We are volunteer Extension Master Gardeners and Tree Care Advisors. We answer yard and garden questions on the website. 

I am not sure I understand your question, or where you think we need to address the two types of flies you mention in your email. 

Here are a few links from the U of M Extension Yard and Garden website on various flies around the farm and yard: 

https://extension.umn.edu/horse-care-and-management/fly-control-around-horses

https://extension.umn.edu/dairy-milking-cows/managing-flies-cattle-farms

https://extension.umn.edu/nuisance-insects/flies

Hope this helps!